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Kang J, He W, Wang K, Chen Y, Liu Y, Li Y, Li W. Single-atom nickel sites boosting Si nanowires for photoelectrocatalytic CO 2 conversion with nearly 100% selectivity. Chem Commun (Camb) 2024; 60:6039-6042. [PMID: 38775147 DOI: 10.1039/d4cc01068j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
It is a challenge to design a photocathode with well-defined active sites for efficient photoelectrocatalytic CO2 reduction. Herein, single-atom Ni sites are integrated into Si nanowires to develop a novel photocathode, denoted as Ni-NC/Si. The photocathode demonstrates a stable faradaic efficiency for CO production, approaching nearly 100% at -0.6 V vs. RHE. The introduction of single-atom Ni sites provides sufficient active sites for CO2 reduction, thereby improving the selectivity towards CO formation.
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Affiliation(s)
- Jihu Kang
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
| | - Wenhao He
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
| | - Keke Wang
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
| | - Yuanyuan Chen
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
| | - Yang Liu
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
| | - Ya Li
- Hunan Institute of Metrology and Test, Changsha, 410014, China.
| | - Wenzhang Li
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
- Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha, 410083, China
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Cheng Y, Yang R, Xia L, Zhao X, Tan Y, Sun M, Li S, Li F, Huang M. Graphene quantum dot-mediated anchoring of highly dispersed bismuth nanoparticles on porous graphene for enhanced electrocatalytic CO 2 reduction to formate. NANOSCALE 2024; 16:2373-2381. [PMID: 38206313 DOI: 10.1039/d3nr05853k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
The electrocatalytic reduction of CO2 to produce formic acid is gaining prominence as a critical technology in the pursuit of carbon neutrality. Nonetheless, it remains challenging to attain both substantial formic acid production and high stability across a wide voltage range, particularly when utilizing bismuth-based catalysts. Herein, we present a novel graphene quantum dot-mediated synthetic strategy to achieve the uniform deposition of highly dispersed bismuth nanoparticles on porous graphene. This innovative design achieves an elevated faradaic efficiency for formate of 87.0% at -1.11 V vs. RHE with high current density and long-term stability. When employing a flow cell, a maximum FEformate of 80.0% was attained with a total current density of 156.5 mA cm-2. The exceptional catalytic properties can be primarily attributed to the use of porous graphene as the support and the auxiliary contribution of graphene quantum dots, which enhance the dispersion of bismuth nanoparticles. This improved dispersion, in turn, has a significantly positive impact on CO2 activation and the generation of *HCOO intermediates to facilitate the formation of formate. This work presents a straightforward technique to create uniform metal nanoparticles on carbon materials for advancing various electrolytic applications.
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Affiliation(s)
- Yi Cheng
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Ruizhe Yang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Lu Xia
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Barcelona 08860, Spain
| | - Xiaoli Zhao
- School of Materials Science and Engineering, Xihua University, Chengdu, 610039, China.
| | - Yuwei Tan
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Ming Sun
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Suming Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Fei Li
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.
| | - Ming Huang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
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