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Wei Z, Ding J, Wang Z, Wang A, Zhang L, Liu Y, Guo Y, Yang X, Zhai Y, Liu B. Enhanced Electrochemical CO 2 Reduction to Formate over Phosphate-Modified In: Water Activation and Active Site Tuning. Angew Chem Int Ed Engl 2024; 63:e202402070. [PMID: 38664999 DOI: 10.1002/anie.202402070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Indexed: 05/28/2024]
Abstract
Electrochemical CO2 reduction reaction (CO2RR) offers a sustainable strategy for producing fuels and chemicals. However, it suffers from sluggish CO2 activation and slow water dissociation. In this work, we construct a (P-O)δ- modified In catalyst that exhibits high activity and selectivity in electrochemical CO2 reduction to formate. A combination of in situ characterizations and kinetic analyses indicate that (P-O)δ- has a strong interaction with K+(H2O)n, which effectively accelerates water dissociation to provide protons. In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) measurements together with density functional theory (DFT) calculations disclose that (P-O)δ- modification leads to a higher valence state of In active site, thus promoting CO2 activation and HCOO* formation, while inhibiting competitive hydrogen evolution reaction (HER). As a result, the (P-O)δ- modified oxide-derived In catalyst exhibits excellent formate selectivity across a broad potential window with a formate Faradaic efficiency as high as 92.1 % at a partial current density of ~200 mA cm-2 and a cathodic potential of -1.2 V vs. RHE in an alkaline electrolyte.
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Affiliation(s)
- Zhiming Wei
- The Institute for Advanced Studies, Wuhan University, 430072, Wuhan, China
| | - Jie Ding
- Department of Materials Science and Engineering, City University of Hong Kong, 999077, Hong Kong SAR, China
| | - Ziyi Wang
- The Institute for Advanced Studies, Wuhan University, 430072, Wuhan, China
| | - Anyang Wang
- School of Electrical Engineering, Wuhan University, 430072, Wuhan, China
| | - Li Zhang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Yuhang Liu
- Department of Materials Science and Engineering, City University of Hong Kong, 999077, Hong Kong SAR, China
| | - Yuzheng Guo
- School of Electrical Engineering, Wuhan University, 430072, Wuhan, China
| | - Xuan Yang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
| | - Yueming Zhai
- The Institute for Advanced Studies, Wuhan University, 430072, Wuhan, China
| | - Bin Liu
- Department of Materials Science and Engineering, City University of Hong Kong, 999077, Hong Kong SAR, China
- Department of Chemistry, Hong Kong Institute of Clean Energy (HKICE) & Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, 999077, Hong Kong SAR, China
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Sun B, Li Z, Xiao D, Liu H, Song K, Wang Z, Liu Y, Zheng Z, Wang P, Dai Y, Huang B, Thomas A, Cheng H. Unveiling pH-Dependent Adsorption Strength of *CO 2 - Intermediate over High-Density Sn Single Atom Catalyst for Acidic CO 2-to-HCOOH Electroreduction. Angew Chem Int Ed Engl 2024; 63:e202318874. [PMID: 38361162 DOI: 10.1002/anie.202318874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/25/2024] [Accepted: 01/26/2024] [Indexed: 02/17/2024]
Abstract
The acidic electrochemical CO2 reduction reaction (CO2RR) for direct formic acid (HCOOH) production holds promise in meeting the carbon-neutral target, yet its performance is hindered by the competing hydrogen evolution reaction (HER). Understanding the adsorption strength of the key intermediates in acidic electrolyte is indispensable to favor CO2RR over HER. In this work, high-density Sn single atom catalysts (SACs) were prepared and used as catalyst, to reveal the pH-dependent adsorption strength and coverage of *CO2 - intermediatethat enables enhanced acidic CO2RR towards direct HCOOH production. At pH=3, Sn SACs could deliver a high Faradaic efficiency (90.8 %) of HCOOH formation and a corresponding partial current density up to -178.5 mA cm-2. The detailed in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopic studies reveal that a favorable alkaline microenvironment for CO2RR to HCOOH is formed near the surface of Sn SACs, even in the acidic electrolyte. More importantly, the pH-dependent adsorption strength of *CO2 - intermediate is unravelled over the Sn SACs, which in turn affects the competition between HER and CO2RR in acidic electrolyte.
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Affiliation(s)
- Bin Sun
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Zaiqi Li
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Difei Xiao
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Hongli Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Kepeng Song
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Zeyan Wang
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Yuanyuan Liu
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Zhaoke Zheng
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Peng Wang
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Ying Dai
- School of Physics, Shandong University, Jinan, 250100, China
| | - Baibiao Huang
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
| | - Arne Thomas
- Department of Chemistry, Division of Functional Materials, Technical University Berlin, Berlin, 10623, Germany
| | - Hefeng Cheng
- State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, 250100, China
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Jia X, Qi K, Yang J, Fan Z, Hua Z, Wan X, Zhao Y, Mao Y, Yang D. Cd/Cd(OH) 2 Nanosheets Enhancing the Electrocatalytic Activity of CO 2 Reduction to CO. Chemistry 2023; 29:e202302613. [PMID: 37837322 DOI: 10.1002/chem.202302613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 10/16/2023]
Abstract
Electric-driven conversion of carbon dioxide (CO2 ) to carbon monoxide (CO) under mild reaction conditions offers a promising approach to mitigate the greenhouse effect and the energy crisis. Surface engineering is believed to be one of the prospective methods for enhancing the electrocatalytic activity of CO2 reduction. Herein, hydroxyl (OH) groups were successfully introduced to cadmium nanosheets to form cadmium and cadmium hydroxide nanocomposites (i. e. Cd/Cd(OH)2 nanosheets) via a facile two-step method. The as-prepared Cd/Cd(OH)2 /CP (CP indicates carbon paper) electrode displays excellent electrocatalytic activity for CO2 reduction to produce CO. The Faradaic efficiency of CO reaches 98.3 % and the current density achieves 23.8 mA cm-2 at -2.0 V vs. Ag/Ag+ in a CO2 -saturated 30 wt% 1-butyl-3-methylimidazole hexafluorophosphate ([Bmim]PF6 )-65 wt% acetonitrile (CH3 CN)-5 wt% water (H2 O) electrolyte. And the CO partial current density can reach up to 71.6 mA cm-2 with the CO Faradaic efficiency of more than 85 % at -2.3 V vs. Ag/Ag+ , which stands out against Cd/CP, Cd(OH)2 /CP, and Cd/CdO/CP electrodes. The excellent electrocatalytic performance of the Cd/Cd(OH)2 /CP electrode can be attributed to its unique structural properties, suitable OH groups, perfect interaction with electrolyte, abundant active sites and fast electron transfer rate.
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Affiliation(s)
- Xiaoyan Jia
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Kongsheng Qi
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Jie Yang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Zixi Fan
- Henan Institute of Advanced Technology, Zhengzhou University Zhengzhou, Henan, 450053, China
| | - Zhixin Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Xiaoqi Wan
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Yuhua Zhao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Yidan Mao
- Henan Institute of Advanced Technology, Zhengzhou University Zhengzhou, Henan, 450053, China
| | - Dexin Yang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan, 450001, China
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