1
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Kim H, Min K, Song G, Kim J, Ham HC, Baeck SH. Hollow-structured cobalt sulfide electrocatalyst for alkaline oxygen evolution reaction: Rational tuning of electronic structure using iron and fluorine dual-doping strategy. J Colloid Interface Sci 2024; 665:922-933. [PMID: 38569309 DOI: 10.1016/j.jcis.2024.03.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/05/2024]
Abstract
Utilizing renewable electricity for water electrolysis offers a promising way for generating high-purity hydrogen gases while mitigating the emission of environmental pollutants. To realize the water electrolysis, it is necessary to develop highly active and precious metal-free electrocatalyst for oxygen evolution reaction (OER) which incurs significant overpotential due to its complicated four-electron transfer mechanism. Hence, we propose a facile preparation method for hollow-structured Fe and F dual-doped CoS2 nanosphere (Fe-CoS2-F) as an efficient OER electrocatalyst. The uniform hollow and porous structure of Fe-CoS2-F enlarge the specific surface area and increase the number of exposed active sites. Furthermore, the Fe and F dual-dopants synergistically contributed to the adjustment of electronic structure, thereby promoting the adsorption/desorption of oxygen-containing reaction intermediates on active sites during the alkaline OER procedure. As a result, the prepared Fe-CoS2-F exhibits outstanding OER activity, characterized by a low overpotential of 298 mV to achieve a current density of 10 mA cm-2 and a Tafel slope as small as 46.0 mV dec-1. Based on computational theoretical calculations, the introduction of the dual-dopants into CoS2 structure reduce the excessively strong adsorption energy of reaction intermediate in the rate determining step, leading to effectively promoted electrocatalytic cycle for OER in alkaline environment. This study presents an effective strategy for preparing noble metal-free OER electrocatalysts with promising potential for large-scale industrial water electrolysis.
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Affiliation(s)
- Hyejin Kim
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy Materials and Process, Inha University, Incheon 22212, Republic of Korea
| | - Kyeongseok Min
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy Materials and Process, Inha University, Incheon 22212, Republic of Korea
| | - Giseong Song
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy Materials and Process, Inha University, Incheon 22212, Republic of Korea
| | - Junseong Kim
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy Materials and Process, Inha University, Incheon 22212, Republic of Korea
| | - Hyung Chul Ham
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy Materials and Process, Inha University, Incheon 22212, Republic of Korea
| | - Sung-Hyeon Baeck
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy Materials and Process, Inha University, Incheon 22212, Republic of Korea.
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2
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Gao L, Chai H, Niu H, Jin J, Ma J. Roles of Cobalt-Coordinated Polymeric Perylene Diimide in Hematite Photoanodes for Improved Water Oxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302665. [PMID: 37264749 DOI: 10.1002/smll.202302665] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/11/2023] [Indexed: 06/03/2023]
Abstract
Interfacial charge recombination is a permanent issue that impedes the photon energy utilization in photoelectrochemical (PEC) water splitting. Herein, a conjugated polymer, urea linked perylene diimide polymer (PDI), is introduced to the designation of hematite-based composite photoanodes. On account of its unique molecule structure with abundant electronegative atoms, the O and N atoms with lone electron pairs can bond with Fe atoms at the surface of Zr4+ doped α-Fe2 O3 (Zr:Fe2 O3 ) and thus establish charge transfer channels for expediting hole separation and migration. Meanwhile, PDI molecules can passivate the surface states in Zr:Fe2 O3 , which is in favor of suppressing carrier recombination. Particularly, Co2+ is used to coordinate with PDI (Co-PDI) to accelerate hole extraction as well as utilization, and the as-obtained Co-PDI form type-II heterojunction with Zr:Fe2 O3 . Such a photoanode configuration takes advantage of the unique molecule structure of PDI, and the target Co-PDI/Zr:Fe2 O3 photoanodes eventually attain a photocurrent density of 2.17 mA cm-2 , which is inspirational for unearthing the potential use of conjugative molecules in PEC fields.
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Affiliation(s)
- Lili Gao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Huan Chai
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Huilin Niu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jun Jin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jiantai Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
- School of Chemical Engineering and Technology, Tianshui Normal University, Tianshui, Gansu, 741001, P. R. China
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3
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Zhang G, Lu C, Li C, Li S, Zhao X, Nie K, Wang J, Feng K, Zhong J. CoMoO 4-modified hematite with oxygen vacancies for high-efficiency solar water splitting. Phys Chem Chem Phys 2023; 25:13410-13416. [PMID: 37161656 DOI: 10.1039/d3cp01192e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Hematite is a potential photoelectrode for photoelectrochemical (PEC) water splitting. Nevertheless, its water oxidation efficiency is highly limited by its significant photogenerated carrier recombination, poor conductivity and slow water oxidation kinetics. Herein, under low-vacuum (LV) conditions, we fabricated a CoMoO4 layer on oxygen-vacancy-modified hematite (CoMo-Fe2O3 (LV)) for the first time for efficient solar water splitting. The existence of oxygen vacancies can significantly facilitate the electrical conductivity, while the large onset potential along with oxygen vacancies can be lowered by the CoMoO4 with accelerated water oxidation kinetics. Therefore, a high photocurrent density of 3.53 mA cm-2 at 1.23 VRHE was obtained for the CoMo-Fe2O3 (LV) photoanode. Moreover, it can be further coupled with the FeNiOOH co-catalyst to reach a benchmark photocurrent of 4.18 mA cm-2 at 1.23 VRHE, which is increased around 4-fold compared with bare hematite (0.90 mA cm-2). The combination of CoMoO4, FeNiOOH, and oxygen vacancies may be used as a reasonable strategy for developing high-efficiency hematite-based photoelectrodes for solar water oxidation.
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Affiliation(s)
- Gaoteng Zhang
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
| | - Cheng Lu
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
| | - Chang Li
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
| | - Shuo Li
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
| | - Xiaoquan Zhao
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
| | - Kaiqi Nie
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jiaou Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Feng
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
| | - Jun Zhong
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China.
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4
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Enabling high low-bias performance of Fe 2O 3 photoanode for photoelectrochemical water splitting. J Colloid Interface Sci 2023; 633:555-565. [PMID: 36470136 DOI: 10.1016/j.jcis.2022.11.134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 11/18/2022] [Accepted: 11/26/2022] [Indexed: 11/30/2022]
Abstract
Fe2O3 is a promising photoanode material used for photoelectrochemical water splitting due to its narrow bandgap and excellent stability in solution. However, because the nanorods shrink and coalesce when annealed under high temperatures, the charge separation and injection efficiencies are suppressed in the conventional nanocoral Fe2O3, resulting in its high bias potential and low photocurrent density. Herein, by improving the radial growth of FeOOH precursor, highly dispersed Fe2O3 nanorods could be prepared. It enabled them to have sufficient light-harvesting and short charge transport distance, high light absorption and charge separation/injection efficiencies, increased photocurrent density and reduced onset potential Von. The optimized Fe2O3 photoanodes obtained a remarkable low-bias photocurrent density of 0.84 mA cm-2 at 1.0 V versus reversible hydrogen electrode (vs. RHE). It was further improved to 1.36 mA cm-2 at 1.0 V vs. RHE with the Von reduced to 0.50 V vs. RHE when post-treated with a solvothermal method and loaded with NiOOH/FeOOH cocatalysts. The applied bias photo-to-current conversion efficiency was maximized to 0.45% at 0.84 V vs. RHE.
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Rohilla J, Lai TH, Wang CY, Tsao CW, Gahlawat S, Hsu YJ, Ingole PP. Mechanistic insights into the origin of MnOx co-catalysts for the improved photoelectrochemical properties of Fe2O3. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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6
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Xu Y, Li Z, Hu X, Wu X, Chen W, Zhou S, Li J, Qi C, Ma DK. Fluorine-doped CuBi2O4 nanorod arrays for enhanced photoelectrochemical oxygen reduction reaction toward H2O2 production. J Catal 2022. [DOI: 10.1016/j.jcat.2022.04.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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7
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Dual-doping in the bulk and the surface to ameliorate the hematite anode for photoelectrochemical water oxidation. J Colloid Interface Sci 2022; 624:60-69. [PMID: 35660911 DOI: 10.1016/j.jcis.2022.04.080] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/07/2022] [Accepted: 04/12/2022] [Indexed: 11/22/2022]
Abstract
Aiming at the drawbacks of hematite like poor conductivity and tardy oxidation kinetics, herein, we utilized dual dopants in the bulk and surface to ameliorate the situation. Specifically, doping optimal amount of Zr4+ in the hematite (Zr:Fe2O3) enhances the conductivity of hematite due to the higher charge carrier density. Further, F:FeOOH could form p-n heterojunction in bulk where a potential barrier is built up that repels electrons but prompts holes transferring to F:FeOOH for water oxidation. What's more, the high electronegative of F- would withdraw electron from the Fe site in FeOOH, and the enhanced positive electricity of Fe3+ is beneficial for adsorption of OH- as well as enhance the conductivity of FeOOH to expedite holes transfer. As a result, the composite photoanode (F:FeOOH/Zr:Fe2O3) shows a 3.25-times enhanced photocurrent density comparing with α-Fe2O3. The special designation employs ultrathin F:FeOOH to act as both p-type semiconductor and efficient co-catalyst, avoiding redundant layer that would extend the migration distance of holes. On the top of that, the dual modification approach provides an extensive prospect for the further application of hematite.
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8
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Arzaee NA, Mohamad Noh MF, Aadenan A, Nawas Mumthas IN, Ab Hamid FF, Kamarudin NN, Mohamed NA, Ibrahim MA, Ismail AF, Mat Teridi MA. Accelerating the controlled synthesis of WO3 photoanode by modifying aerosol-assisted chemical vapour deposition for photoelectrochemical water splitting. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Wang P, Li F, Long X, Wang T, Chai H, Yang H, Li S, Ma J, Jin J. Bifunctional citrate-Ni 0.9Co 0.1(OH) x layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation. NANOSCALE 2021; 13:14197-14206. [PMID: 34477701 DOI: 10.1039/d1nr03257g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surface modification by loading a water oxidation co-catalyst (WOC) is generally considered an efficient means to optimize the sluggish surface oxygen evolution reaction (OER) of a hematite photoanode for photoelectrochemical (PEC) water oxidation. However, the surface WOC usually exerts little impact on the bulk charge separation of hematite. Herein, an ultrathin citrate-Ni0.9Co0.1(OH)x [Cit-Ni0.9Co0.1(OH)x] is conformally coated on the fluorine-doped hematite (F-Fe2O3) photoanode for PEC water oxidation to simultaneously promote the internal hole extraction and surface hole injection of the target photoanode. Besides, the conformally coated Cit-Ni0.9Co0.1(OH)x overlayer passivates the redundant surface trap states of F-Fe2O3. These factors result in a superior photocurrent density of 2.52 mA cm-2 at 1.23 V versus a reversible hydrogen electrode (V vs. RHE) for the target photoanode. Detailed investigation manifests that the hole extraction property in Cit-Ni0.9Co0.1(OH)x is mainly derived from the Ni sites, while Co incorporation endows the overlayer with more catalytic active sites. This synergistic effect between Ni and Co contributes to a rapid and continuous hole migration pathway from the bulk to the interface of the target photoanode, and then to the electrolyte for water oxidation.
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Affiliation(s)
- Peng Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China.
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10
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Katsuki T, Zahran ZN, Tanaka K, Eo T, Mohamed EA, Tsubonouchi Y, Berber MR, Yagi M. Facile Fabrication of a Highly Crystalline and Well-Interconnected Hematite Nanoparticle Photoanode for Efficient Visible-Light-Driven Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:39282-39290. [PMID: 34387481 DOI: 10.1021/acsami.1c08949] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Facile and scalable fabrication of α-Fe2O3 photoanodes using a precursor solution containing FeIII ions and 1-ethylimidazole (EIm) in methanol was demonstrated to afford a rigidly adhered α-Fe2O3 film with a controllable thickness on a fluorine-doped tin oxide (FTO) substrate. EIm ligation to FeIII ions in the precursor solution brought about high crystallinity of three-dimensionally well-interconnected nanoparticles of α-Fe2O3 upon sintering. This is responsible for the 13.6 times higher photocurrent density (at 1.23 V vs reference hydrogen electrode (RHE)) for photoelectrochemical (PEC) water oxidation on the α-Fe2O3 (w-α-Fe2O3) photoanode prepared with EIm compared with that (w/o-α-Fe2O3) prepared without EIm. The w-α-Fe2O3 photoanode provided the highest charge separation efficiency (ηsep) value of 27% among the state-of-the-art pristine α-Fe2O3 photoanodes, providing incident photon-to-current conversion efficiency (IPCE) of 13% at 420 nm and 1.23 V vs RHE. The superior ηsep for the w-α-Fe2O3 photoanode is attributed to the decreased recombination of the photogenerated charge carriers at the grain boundary between nanoparticles, in addition to the higher number of the catalytically active sites and the efficient bulk charge transport in the film, compared with w/o-α-Fe2O3.
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Affiliation(s)
- Tomohiro Katsuki
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
| | - Zaki N Zahran
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
- Faculty of Science, Tanta University, Tanta 5111, Egypt
| | - Kou Tanaka
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
| | - Tatsuya Eo
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
| | - Eman A Mohamed
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
| | - Yuta Tsubonouchi
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
| | - Mohamed R Berber
- Chemistry Department, College of Science, Jouf University, Sakaka 2014, Saudi Arabia
| | - Masayuki Yagi
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi-2, Niigata 9050-2181, Japan
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11
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Jiao T, Lu C, Feng K, Deng J, Long D, Zhong J. N and Sn Co-Doped hematite photoanodes for efficient solar water oxidation. J Colloid Interface Sci 2021; 585:660-667. [DOI: 10.1016/j.jcis.2020.10.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 12/21/2022]
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12
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Xu S, Lin C, Wang T, Wang C, Chen C, Dong C. Selective converting surface states of hematite photoelectrodes to catalytic active sites. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Su Xu
- School of Environmental Sciences and Engineering Xiamen University of Technology Xiamen PR China
- Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University Hsinchu Taiwan
| | - Cheng Lin
- Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University Hsinchu Taiwan
| | - TsingHai Wang
- Department of Chemical Engineering and Materials Science Yuan Ze University Zhongli Taiwan
| | - Chu‐Fang Wang
- Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University Hsinchu Taiwan
| | - Chiu‐Wen Chen
- Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan
| | - Cheng‐Di Dong
- Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan
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13
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Lei B, Xu D, Wei B, Xie T, Xiao C, Jin W, Xu L. In Situ Synthesis of α-Fe 2O 3/Fe 3O 4 Heterojunction Photoanode via Fast Flame Annealing for Enhanced Charge Separation and Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4785-4795. [PMID: 33430580 DOI: 10.1021/acsami.0c19927] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hematite (α-Fe2O3) is a promising photoanode material in photoelectrochemical (PEC) water splitting. To further improve the catalytic activity, a reasonable construction of heterojunction and surface engineering can effectively improve the photoanode PEC water-splitting performance via improving bulk carrier transport and interfacial charge-transfer efficiency. As Fe3O4 has an excellent conductivity and a suitable energy band position, α-Fe2O3/Fe3O4 heterojunction can be an ideal structure to improve the activity of α-Fe2O3. However, only few studies have been reported on α-Fe2O3/Fe3O4 heterojunctions as photoanodes. In this work, a holey nanorod Fe2O3/Fe3O4 heterojunction photoanode with oxygen vacancies was fabricated using a rapid and facile flame reduction treatment. Compared with pure Fe2O3, the water oxidation performance of the Fe2O3/Fe3O4 photoanode is improved by ninefold at 1.23 VRHE. Our study revealed that the porous nanorod structure providing more active sites and oxygen vacancies as the hole transfer medium, together improve the interface charge transfer performance of the photoanode. At the same time, Fe3O4 can form a Fe2O3/Fe3O4 heterojunction to improve the carrier separation efficiency. More importantly, Fe3O4 can serve as active sites, solving the slow water oxidation kinetic problem of hematite to enhance the catalytic activity. Our work shows that when flame acts on precursors containing oxygen or hydroxide, it is easy to form compounds with different microstructures or compositions in situ.
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Affiliation(s)
- Bo Lei
- Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
| | - Dandan Xu
- Department of Chemistry, Harbin Normal University, Harbin 150025, China
| | - Bo Wei
- Department of Physics, Harbin Institute of Technology, Harbin 150080, China
| | - Tengfeng Xie
- College of Chemistry, Jilin University, Changchun 130023, China
| | - Chunyu Xiao
- Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
| | - Weiliang Jin
- Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
| | - Lingling Xu
- Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China
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14
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Maitra S, Sarkar A, Maitra T, Halder S, Kargupta K, Roy S. Solvothermal phase change induced morphology transformation in CdS/CoFe 2O 4@Fe 2O 3 hierarchical nanosphere arrays as ternary heterojunction photoanodes for solar water splitting. NEW J CHEM 2021. [DOI: 10.1039/d1nj00864a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The design of efficient heterojunction photoanodes with appropriate band alignment and ease of charge separation has been one of the most highly focused research areas in photoelectrodes.
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Affiliation(s)
- Soumyajit Maitra
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
| | - Arundhati Sarkar
- Department of Chemical Engineering
- Jadavpur University
- Kolkata
- India
| | - Toulik Maitra
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
| | - Somoprova Halder
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
| | - Kajari Kargupta
- Department of Chemical Engineering
- Jadavpur University
- Kolkata
- India
| | - Subhasis Roy
- Department of Chemical Engineering
- University of Calcutta
- Kolkata
- India
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15
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Gao B, Wang T, Xue H, Jiang C, Sheng L, Huang X, He J. A nano-surface monocrystalline BiVO 4 nanoplate photoanode for enhanced photoelectrochemical performance. NEW J CHEM 2021. [DOI: 10.1039/d1nj00658d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nano-surface monocrystalline BiVO4 photoanode with a large surface area is prepared by a low-cost and simple etching process.
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Affiliation(s)
- Bin Gao
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Tao Wang
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Hairong Xue
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Cheng Jiang
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Lei Sheng
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Xianli Huang
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
| | - Jianping He
- College of Materials Science and Technology
- Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies
- Nanjing University of Aeronautics and Astronautics
- Nanjing
- P. R. China
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16
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Wang T, Fan X, Gao B, Jiang C, Li Y, Li P, Zhang S, Huang X, He J. Self‐Assembled Urchin‐Like CuWO
4
/WO
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Heterojunction Nanoarrays as Photoanodes for Photoelectrochemical Water Splitting. ChemElectroChem 2020. [DOI: 10.1002/celc.202001154] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Tao Wang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Xiaoli Fan
- School of Materials Science and Engineering Nanjing Institute of Technology 211167 Nanjing PR China
| | - Bin Gao
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Cheng Jiang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Yang Li
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Peng Li
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Songtao Zhang
- Testing Center Yangzhou University Yangzhou 225009 PR China
| | - Xianli Huang
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
| | - Jianping He
- College of Materials Science and Technology Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies Nanjing University of Aeronautics and Astronautics Nanjing 210016 PR China
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17
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Tao SM, Chung RJ, Lin LY. Heteroatom Doping Strategy for Establishing Hematite Homojunction as Efficient Photocatalyst for Accelerating Water Splitting. Chem Asian J 2020; 15:3853-3860. [PMID: 32955150 DOI: 10.1002/asia.202001021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/11/2020] [Indexed: 11/10/2022]
Abstract
Hematite (α-Fe2 O3 ) is one of the promising photocatalysts for water oxidation, owing to its stable, abundant and visible-light responsive features. Enhancing electrical conductivity and accelerating oxidation evolution kinetics are expected to improve photocatalytic ability of hematite toward water oxidation. In this work, strategies of doping heteroatoms and developing pn homojunction are adopted to enhance the photocatalytic ability of hematite electrodes. The Ti and Mg dopants are separately incorporated in two layers of hematite electrodes via two-step hydrothermal reaction and one-step annealing process. The effect of regrowth time for synthesizing Mg-doped hematite on the photoelectrochemical performance of Mg-doped and Ti-doped hematite (Mg-Fe2 O3 /Ti-Fe2 O3 ) electrode is studied. The size of rod-like structure and gaps in-between play important roles on the photocatalytic ability of Mg-Fe2 O3 /Ti-Fe2 O3 . The optimized Mg-Fe2 O3 /Ti-Fe2 O3 electrode is prepared by using merely 10 min for synthesizing the Mg-doped hematite top layer, which shows the highest photocurrent density of 2.83 mA/cm2 at 1.60 VRHE along with the highest carrier density of 5.89×1016 cm-3 and the smallest charge-transfer resistance. This largely improved photoelectrochemical performance is attributed to the more donor generation with heteroatom-doping and more efficient charge cascade with homojunction establishment. Other p-type metals are encouraged to dope in hematite as the second layer to couple with the n-type Ti-doped hematite for developing efficient pn homojunction and improve the photocatalytic ability of hematite in the near future.
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Affiliation(s)
- Shang-Mao Tao
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Lu-Yin Lin
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan.,Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors, Taipei, Taiwan
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18
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Mei X, Bai J, Chen S, Zhou M, Jiang P, Zhou C, Fang F, Zhang Y, Li J, Long M, Zhou B. Efficient SO 2 Removal and Highly Synergistic H 2O 2 Production Based on a Novel Dual-Function Photoelectrocatalytic System. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:11515-11525. [PMID: 32786587 DOI: 10.1021/acs.est.0c00886] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The direct conversion of SO2 to SO3 is rather difficult for flue gas desulfurization due to its inert dynamic with high reaction activation energy, and the absorption by wet limestone-gypsum also needs the forced oxidation of O2 to oxidize sulfite to sulfate, which is necessary for additional aeration. Here, we propose a method to remove SO2 with highly synergistic H2O2 production based on a novel dual-function photoelectrocatalytic (PEC) system in which the jointed spontaneous reaction of desulfurization and H2O2 production was integrated instead of nonspontaneous reaction of O2 to H2O2. SO2 was absorbed by alkali liquor then oxidized quickly into SO42- by a nanorod α-Fe2O3 photoanode, which possessed high alkali corrosion resistance and electron transport properties. H2O2 was produced simultaneously in the cathode chamber on a gas diffusion electrode and was remarkably boosted by the conversion reaction of SO32- to SO42- in the anode chamber in which the released chemical energy was effectively used to increase H2O2. The photocurrent density increased by 40% up to 1.2 mA·cm-2, and the H2O2 evolution rate achieved 58.8 μmol·L-1·h-1·cm-2 with the synergistic treatment of SO2, which is about five times than that without SO2. This proposed PEC cell system offers a cost-effective and environmental-benign approach for dual purpose of flue gas desulfurization and simultaneous high-valued H2O2 production.
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Affiliation(s)
- Xiaojie Mei
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Jing Bai
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
| | - Shuai Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Mengyang Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Panyu Jiang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Changhui Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Fei Fang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Yan Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Jinhua Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Mingce Long
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
| | - Baoxue Zhou
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai 200240, PR China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China
- Key Laboratory of Thin Film and Microfabrication Technology, Ministry of Education, Shanghai 200240, PR China
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19
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Li X, Tang Y, Zhu J, Lv H, Zhao L, Wang W, Zhi C, Li H. Boosting the Cycling Stability of Aqueous Flexible Zn Batteries via F Doping in Nickel-Cobalt Carbonate Hydroxide Cathode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001935. [PMID: 32603014 DOI: 10.1002/smll.202001935] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/30/2020] [Indexed: 06/11/2023]
Abstract
Cathodes of rechargeable Zn batteries typically face the issues of irreversible phase transformation, structure collapse, and volume expansion during repeated charge/discharge cycles, which result in an increased transfer resistance and poor long-term cycling stability. Herein, a facile F doping strategy is developed to boost the cycling stability of nickel cobalt carbonate hydroxide (NiCo-CH) cathode. Benefiting from the extremely high electronegativity, the phase and morphology stabilities as well as the electrical conductivity of NiCo-CH are remarkably enhanced by F incorporation (NiCo-CH-F). Phase interface and amorphous microdomains are also introduced, which are favorable for the electrochemical performance of cathode. Benefiting from these features, NiCo-CH-F delivers a high capacity (245 mA h g-1 ), excellent rate capability (64% retention at 8 A g-1 ), and outstanding cycling stability (maintains 90% after 10 000 cycles). Moreover, the quasi-solid-state battery also manifests superior cycling stability (maintains 90% after 7200 cycles) and desirable flexibility. This work offers a general strategy to boost the cycling stability of cathode materials for aqueous Zn batteries.
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Affiliation(s)
- Xuejin Li
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing, 100190, China
| | - Yongchao Tang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing, 100190, China
| | - Jiaxiong Zhu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Haiming Lv
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing, 100190, China
| | - Lianming Zhao
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, 266580, China
| | - Wenlong Wang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing, 100190, China
| | - Chunyi Zhi
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, China
| | - Hongfei Li
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
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