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.

中文翻译：

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硼氢化物氧化-水还原燃料电池在 Cu（0） 位点上通过局部羟基富集抑制硼氢化物水解推进


已经建立了一种很有前途的燃料电池，它使用酸性析氢反应 （HER） 代替动力学缓慢的氧还原反应与硼氢化物氧化反应 （BOR） 耦合。该 BOR-HER 燃料电池 （BHFC） 实现了发电和制氢的同步。为了催化 HER/BOR，开发了一种在泡沫铜 （Cu-CoP/CF） 上生长的铜 （Cu） 掺杂磷化钴纳米片，它在 BOR 过程中表现出显着抑制的竞争性 NaBH₄ 水解，以及在 700 小时内表现出优异的 HER 性能和稳定性。具体来说，在 Cu-CoP/CF 表面原位形成的 Cu（0） 在创造富含 OH⁻ 的局部环境中起决定性作用，导致硼氢化物水解受到显著抑制，但 BOR 选择性大大提高，高达 85%，以及 BOR 的热力学屏障降低。配备 Cu-CoP/CF 的组装 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。