Trends in electrocatalytic activity and stability of transition metal nitrides

IF 11.5 Q1 CHEMISTRY, PHYSICAL Chem Catalysis Pub Date : 2024-01-04 DOI:10.1016/j.checat.2023.100867

Hansen Mou, Jaehun Jason Jeong, Bipin Lamichhane, Shyam Kattel, Zechao Zhuang, Ji Hoon Lee, Qiaowan Chang, Jingguang G. Chen

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Abstract

Transition metal nitrides (TMNs) are a class of electrocatalyst support materials similar to transition metal carbides (TMCs) with the advantage of avoiding the issues arising from graphitic carbon surface deposits during synthesis. Inspired by previous studies suggesting that TMCs could be used to reduce Pt loading for the hydrogen evolution reaction (HER), this work explored the feasibility of TMN-supported Pt and Au as HER electrocatalysts. This study established a volcano-like trend between electrochemical HER activity and hydrogen-binding energy (HBE) calculated from density functional theory. The Pt/TiN and Au/TiN materials were used to extend knowledge from well-characterized thin films to powder catalysts. In situ X-ray absorption spectroscopy (XAS) measurements provided additional characterization of the Pt/TiN and Au/TiN catalysts under HER conditions. Trends in the electrochemical stability of TMNs were also investigated over a wide range of potentials and pH values, which can be used to guide future studies for TMN-supported electrocatalysts.

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过渡金属氮化物的电催化活性和稳定性趋势

过渡金属氮化物（TMNs）是一类类似于过渡金属碳化物（TMCs）的电催化剂支撑材料，其优点是避免了合成过程中石墨碳表面沉积物引起的问题。之前的研究表明，TMCs 可用于减少氢进化反应（HER）中的铂负载，受此启发，本研究探索了 TMN 支持的铂和金作为 HER 电催化剂的可行性。这项研究确定了电化学 HER 活性与密度泛函理论计算得出的氢结合能 (HBE) 之间类似火山喷发的趋势。研究使用了 Pt/TiN 和 Au/TiN 材料，将知识从表征良好的薄膜扩展到粉末催化剂。原位 X 射线吸收光谱 (XAS) 测量提供了 Pt/TiN 和 Au/TiN 催化剂在 HER 条件下的其他特征。此外，还研究了 TMN 在广泛的电位和 pH 值范围内的电化学稳定性趋势，这可用于指导 TMN 支持的电催化剂的未来研究。

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来源期刊

Chem Catalysis

CiteScore

10.50

自引率

6.40%

发文量

期刊介绍： Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.