The slow anodic oxygen evolution reaction (OER) significantly limits electrocatalytic water splitting for hydrogen production. We proposed the electrocatalyst for glucose oxidation by Ta-doping NiFe LDH nanosheets to simultaneously obtain glucaric acid (GRA) and hydrogen gas as a useful byproduct. Superior glucose oxidation reaction (GOR) activity is demonstrated by the optimized Ta–NiFe LDH, which has a low overpotential of 192 mV, allowing for a small Tafel slope of 70 mV dec^–1 and a current density of 50 mA cm^–2. The Ta NiFe LDH-oxidized glucose to GRA with a 72.94% yield and 64.3% Faradaic efficiency at 1.45 V_RHE. Herein, we report the Ta NiFe LDH/NF electrode for the GOR&hydrogen evolution reaction (HER), which exhibits a cell voltage of 1.62 V to reach a current density of 10 mA cm^–2, which is 250 mV lower compared to OER&HER (1.87 V). This study reveals that GOR is an energy-efficient and cost-effective method for producing H₂ and valorizing biomass.

中文翻译：

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Ta NiFe LDH 电极电催化葡萄糖氧化生产 H2 和葡萄糖酸


缓慢的阳极析氧反应（OER）显着限制了电催化水分解制氢。我们提出了通过 Ta 掺杂 NiFe LDH 纳米片进行葡萄糖氧化的电催化剂，以同时获得葡萄糖二酸（GRA）和氢气作为有用的副产物。优化的 Ta-NiFe LDH 展现了卓越的葡萄糖氧化反应 (GOR) 活性，该 LDH 具有 192 mV 的低过电势，允许 70 mV dec ^–1 的小塔菲尔斜率和 50 的电流密度mA 厘米 ^–2 。 Ta NiFe LDH 氧化葡萄糖生成 GRA，在 1.45 V _RHE 下产率为 72.94%，法拉第效率为 64.3%。在此，我们报道了用于 GOR 和析氢反应 (HER) 的 Ta NiFe LDH/NF 电极，其电池电压为 1.62 V，可达到 10 mA cm ^–2 的电流密度，降低了 250 mV与 OER&HER (1.87 V) 相比。这项研究表明，GOR 是一种生产 H ₂ 和提高生物质价值的节能且具有成本效益的方法。