通过局部羟基富集抑制铜(0)位上的硼氢化物水解推进硼氢化物氧化-水还原燃料电池的发展

IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Chem Pub Date : 2024-10-21 DOI:10.1016/j.chempr.2024.09.030
Libo Zhu, Chang Chen, Tiantian Wu, Xu Yu, Han Tian, Fantao Kong, Ziwei Chang, Wenshu Luo, Xiangzhi Cui, Jianlin Shi
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引用次数: 0

摘要

利用酸性氢进化反应(HER)代替动力学迟缓的氧还原反应,与硼氢化物氧化反应(BOR)耦合的燃料电池已经建立。这种 BOR-HER 燃料电池(BHFC)实现了同时发电和制氢。为了催化 HER/BOR,研究人员开发了一种生长在泡沫铜(Cu)上的掺铜磷化钴纳米片(Cu-CoP/CF),该纳米片在 BOR 过程中显著抑制了 NaBH4 的竞争性水解,同时还具有优异的 HER 性能和超过 700 小时的稳定性。具体来说,Cu-CoP/CF 表面原位形成的 Cu(0) 在创造富含 OH 的局部环境方面起着决定性作用,从而显著抑制了硼氢化物的水解,但大大提高了 BOR 的选择性(高达 85%),并降低了 BOR 的热力学势垒。装配有 Cu-CoP/CF 的 BHFC 能够产生 114 mW cm-2 的高功率密度,同时在阴极以至少 40 mol h-1 m-2 的速率产生氢气。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Borohydride oxidation-water reduction fuel cells advanced by local hydroxyl enrichment-inhibited borohydride hydrolysis on Cu(0) sites

Borohydride oxidation-water reduction fuel cells advanced by local hydroxyl enrichment-inhibited borohydride hydrolysis on Cu(0) sites
A promising fuel cell using the acidic hydrogen evolution reaction (HER) instead of kinetically sluggish oxygen reduction reaction to couple with the borohydride oxidation reaction (BOR) has been established. This BOR-HER fuel cell (BHFC) has achieved the concurrent electricity generation and hydrogen production. To catalyze HER/BOR, a copper (Cu)-doped cobalt phosphide nanosheet grown on Cu foam (Cu–CoP/CF) was developed, which exhibits significantly inhibited competitive NaBH4 hydrolysis during BOR, along with excellent HER performance and stability over 700 h. Specifically, the Cu(0), in situ formed on the surface of Cu–CoP/CF, plays a decisive role in creating an OH-enriched local environment, resulting in significantly inhibited borohydride hydrolysis but greatly enhanced BOR selectivity of up to 85%, as well as the reduced thermodynamic barrier of BOR. The assembled BHFC equipped with Cu–CoP/CF is capable of generating a high power density of 114 mW cm−2 and concurrently producing hydrogen at a rate of at least 40 mol h−1 m−2 at cathode.
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来源期刊
Chem
Chem Environmental Science-Environmental Chemistry
CiteScore
32.40
自引率
1.30%
发文量
281
期刊介绍: Chem, affiliated with Cell as its sister journal, serves as a platform for groundbreaking research and illustrates how fundamental inquiries in chemistry and its related fields can contribute to addressing future global challenges. It was established in 2016, and is currently edited by Robert Eagling.
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