Ni-Cu-based phosphide heterojunction for 5-hydroxymethylfurfural electrooxidation-assisted hydrogen production at large current density

材料科学 磷化物 异质结 制氢 电流(流体) 电流密度 化学工程 无机化学 光电子学 冶金 有机化学 电气工程 化学 物理 量子力学 工程类
作者
Jiajun Fu,Ganceng Yang,Yanqing Jiao,Chungui Tian,Haijing Yan,Honggang Fu
出处
期刊:Nano Energy [Elsevier BV]
卷期号:127: 109727-109727 被引量:11
标识
DOI:10.1016/j.nanoen.2024.109727
摘要

5-hydroxymethylfurfural oxidation reaction (HMFOR) offers a promising avenue to achieve energy-saving H2 production and produce value-added chemicals. However, the lack of HMFOR electrocatalysts with large current density and high selectivity impedes the whole productivity. Herein, an Ni3P-Cu3P heterojunction grown on Cu foam (Ni3P-Cu3P/CF) was successfully constructed, achieving large current density (300 mA cm-2 at 1.60 V vs. RHE) and high selectivity and Faradaic efficiency (>99%) for HMFOR. The X-ray photoelectron spectroscopy and theoretical calculations reveal that the interface charge redistributes at the Ni3P-Cu3P heterointerface, resulting into the charge-deficiency Ni3P and charge-accumulation Cu3P. The charge-deficiency Ni3P induced by charge-attracting Cu3P favors to form more high-valence Ni species, which facilitates to optimize the adsorption of HMF and OH⁎ species for improving current density and decreasing potential, while the charge-accumulation Cu3P enables to broaden the potential window by suppressing competitive oxygen evolution reaction, thus elevating the conversion rate and selectivity of products. Benefiting from the excellent performance of Ni3P-Cu3P/CF for HMFOR, when constructing a HMFOR-assisted H2 production system using Ni3P-Cu3P/CF and self-prepared MoNiNx/NF as anode and cathode, the energy consumption was substantially decreased to 3.8 kW•h/Nm3 relative to that of pure water splitting (4.66 kW•h/Nm3). Our work is instructive for achieving low energy consumption of H2 production and synthesis of valuable chemicals by constructing heterojunction.
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