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精确的间歇性内置电场调用于进化电触媒电解

Jiawei Fei¹, Dan Zhang², Tiantian Wang¹

¹State Key Laboratory Base of Eco-Chemical Engineering, International Science and Technology Cooperation Base of Eco-Chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, P. R. China.

Inorganic chemistry

|November 27, 2023

概括

研究人员通过插入来精确调整纳米催化剂中的内置电场 (BEF). 这种优化显著增强了演变反应 (HERs),并促进了溢出,以实现高效的水分裂.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

内置电场 (BEF) 对于调整电子结构和催化过程中的溢出至关重要.
现有的BEF方法缺乏精确和连续的调整性,限制了催化剂的优化.
控制BEF是改善反应中间体吸附和整体催化效率的关键.

研究的目的:

合成纳米催化剂与精确调节的间歇性内置电场 (BEF).
调查间歇性BEF强度对中间吸附和溢出的影响.
评估这些新型催化剂的催化性能,用于演化反应 (HERs).

主要方法:

一系列纳米催化剂 (Bx-Cu/NC) 的合成,其间隙含量可变,以创建可调节的BEF.
对间歇性BEF对中间吸附和溢出的影响进行系统调查.
对演化反应 (HER) 的电催化测试和在PEM水电解器中稳定性评估.
使用密度函数理论 (DFT) 和现场拉曼光谱的计算分析.

主要成果:

成功合成了三种具有不同的BEF强度的催化剂 (B0.22-Cu/NC,B0.30-Cu/NC,B0.41-Cu/NC).
B0.30-Cu/NC 显示出优越的 HER 性能,在 -0.1 V 时达到 0.36 s-1 的转速频率 (TOF),与 RHE 相比,是纯的三倍.
在PEM水电解器中,B0.30-Cu/NC催化剂在500mA cm-2.2的温度下表现出优异的长期稳定性.

结论:

精确调整的间歇BEF是优化纳米催化剂性能的一种高度有效的策略.
合适的间隙BEF增强了中间吸附,并促进了溢出,提高了HER的效率.
开发的B0.30-Cu/NC催化剂代表了基于铜的HER催化剂和水分裂技术的重大进步.

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