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Modulating the electrocatalytic CO2 reduction performances of bismuth nanoparticles with carbon substrates with controlled degrees of oxidation
Nanoscale ( IF 5.8 ) Pub Date : 2021-11-19 , DOI: 10.1039/d1nr05793f
Si-Qian Wu 1 , Yu-Chen Hao 1 , Li-Wei Chen 1 , Jiani Li 1 , Zi-Long Yu 1 , Zhejiaji Zhu 1 , Di Liu 1 , Xin Su 1 , Linyu Hu 1 , Hui-Zi Huang 1 , An-Xiang Yin 1
Affiliation  

The catalytic performances of metal nanoparticles can be widely tuned and promoted by the metal–support interactions. Here, we report that the morphologies and electrocatalytic CO2 reduction reaction (CO2RR) properties of bismuth nanoparticles (BiNPs) can be rationally modulated by their interactions with carbon black (CB) supports by controlling the degree of surface oxidation. Appropriately oxidized CB supports can provide sufficient oxygen-containing groups for anchoring BiNPs with tunable sizes and surface areas, desirable key intermediate adsorption abilities, appropriate surface wettability, and adequate electron transfer abilities. As a result, the optimized Bi/CB catalysts exhibited a promoted CO2RR performance with a Faradaic efficiency of 94% and a current density of 16.7 mA cm−2 for HCOO at −0.9 V versus a reversible hydrogen electrode. Our results demonstrate the significance of regulating the interactions between supports and metal nanoparticles for both synthesis of the catalyst and electrolysis applications, which may find broader applicability in more electrocatalyst designs.

中文翻译:

用可控氧化度的碳基底调节铋纳米颗粒的电催化 CO2 还原性能

金属纳米颗粒的催化性能可以通过金属-载体相互作用广泛调节和促进。在这里,我们报告说,通过控制表面氧化程度,铋纳米颗粒 (BiNPs)的形态和电催化CO 2还原反应 (CO 2 RR) 特性可以通过它们与炭黑 (CB) 载体的相互作用进行合理调节。适当氧化的 CB 载体可以提供足够的含氧基团,用于锚定具有可调尺寸和表面积、理想的关键中间吸附能力、适当的表面润湿性和足够的电子转移能力的 BiNP。结果,优化的 Bi/CB 催化剂表现出促进的 CO 2可逆氢电极相比,HCOO -在 -0.9 V 时具有 94% 的法拉第效率和 16.7 mA cm -2的电流密度的 RR 性能。我们的结果证明了调节载体和金属纳米粒子之间的相互作用对于催化剂合成和电解应用的重要性,这可能会在更多的电催化剂设计中找到更广泛的适用性。
更新日期:2021-11-30
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