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基于Mo-Ni的异质连接,具有精细定制的d频段中心,用于生产气,并与低性介质中基胺电氧化相结合

Yue Li¹, Yanqing Jiao¹, Haijing Yan¹

¹Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, China.

Angewandte Chemie (International ed. in English)

|June 14, 2023

概括

一个新的MoNiN-Ni3N异构连接促进了的产生和胺电氧化. 这种双功能催化剂在低性条件下实现高效率,使可扩展的绿色和有价值的产品产生成为可能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

酸电氧化 (BAOR) 是生产酸和 (H2) 的关键途径.
在低性介质中实现对HER和BAOR的高性能仍然是一个重大挑战.
催化剂设计需要对d电子结构进行操纵,以调节水中的活性物种.

研究的目的:

构建一个双相Mo0.8Ni0.2N-Ni3N异构连接,以增强双功能HER和BAOR.
为了定制催化剂的d波段中心,以提高催化活性.
研究电荷转移机制及其对催化性能的影响.

主要方法:

一个双相Mo0.8Ni0.2N-Ni3N异构连接的合成.
电化学表征包括HER和BAOR性能测试.
实验和理论计算 (例如,DFT) 来分析电子结构和反应机制.

主要成果:

由于电荷转移,异质连接结构有效地向上移动d频段中心.
优化的d波段中心促进了水的激活和H*吸附,从而增强了HER.
促进OH*生产和优化zylamine对Ni3N的吸附促进了高效的BAOR.
在1.59V时达到220mAcm-2的工业电流密度,H2和二的法拉第效率高于99%.

结论:

设计的MoNiN-Ni3N异构连接显示了对合的HER和BAOR的优异的双功能电催化活性.
定制d频段中心是开发低性介质中高效电催化剂的可行策略.
这项工作为可扩展生产绿色和附加值化学品提供了指导.

关键词:

甲胺电氧化电氧化电催化生产的电催化生产精细定制的d频段中心.异质连接异质连接低性介质低性介质

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