|
1
|
Yang P, Zhang L, Wei X, Dong S, Cao W, Ma D, Ouyang Y, Xie Y, Fei J. A "Special" Solvent to Prepare Alloyed Pd 2Ni 1 Nanoclusters on a MWCNT Catalyst for Enhanced Electrocatalytic Oxidation of Formic Acid. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:755. [PMID: 36839122 PMCID: PMC9963789 DOI: 10.3390/nano13040755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/03/2023] [Accepted: 02/12/2023] [Indexed: 06/18/2023]
Abstract
Herein, an electrocatalyst with Pd2Ni1 nanoclusters, supporting multiwalled carbon nanotubes (MWCNTs) (referred to Pd2Ni1/CNTs), was fabricated with deep eutectic solvents (DES), which simultaneously served as reducing agent, dispersant, and solvent. The mass activity of the catalyst for formic acid oxidation reaction (FAOR) was increased nearly four times compared to a Pd/C catalyst. The excellent catalytic activity of Pd2Ni1/CNTs was ascribed to the special nanocluster structure and appropriate Ni doping, which changed the electron configuration of Pd to reduce the d-band and to produce a Pd-Ni bond as a new active sites. These newly added Ni sites obtained more OH- to release more effective active sites by interacting with the intermediate produced in the first step of FAOR. Hence, this study provides a new method for preparing a Pd-Ni catalyst with high catalytic performance.
Collapse
Affiliation(s)
- Pingping Yang
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
- College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Li Zhang
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
- College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Xuejiao Wei
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
| | - Shiming Dong
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
| | - Wenting Cao
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
| | - Dong Ma
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
| | - Yuejun Ouyang
- College of Chemistry and Materials Engineering, Huaihua University, Huaihua 418008, China
| | - Yixi Xie
- College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Junjie Fei
- College of Chemistry, Xiangtan University, Xiangtan 411105, China
| |
Collapse
|
|
2
|
Yang P, Zhang L, Wei X, Dong S, Ouyang Y. Pd 3Co 1 Alloy Nanocluster on the MWCNT Catalyst for Efficient Formic Acid Electro-Oxidation. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4182. [PMID: 36500805 PMCID: PMC9740167 DOI: 10.3390/nano12234182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/19/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
In this study, the Pd3Co1 alloy nanocluster from a multiwalled carbon nanotube (MWCTN) catalyst was fabricated in deep eutectic solvents (DESs) (referred to Pd3Co1/CNTs). The catalyst shows a better mass activity towards the formic acid oxidation reaction (FAOR) (2410.1 mA mgPd-1), a better anti-CO toxicity (0.36 V) than Pd/CNTs and commercial Pd/C. The improved performance of Pd3Co1/CNTs is attributed to appropriate Co doping, which changed the electronic state around the Pd atom, lowered the d-band of Pd, formed a new Pd-Co bond act at the active sites, affected the adsorption of the toxic intermediates and weakened the dissolution of Pd; moreover, with the assistance of DES, the obtained ultrafine Pd3Co1 nanoalloy exposes more active sites to enhance the dehydrogenation process of the FAOR. The study shows a new way to construct a high-performance Pd-alloy catalyst for the direct formic acid fuel cell.
Collapse
|
|
3
|
Facile One-step Aqueous-phase Synthesis of Porous PtBi Nanosponges for Efficient Electrochemical Methanol Oxidation with a High CO Tolerance. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116361] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
|
4
|
Electrocatalytic oxidation of formic acid on Pd/CNTs nanocatalysts synthesized in special “non-aqueous” system. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|