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表面重建的Ni_0.95Pt_0.05/Si光电极用于无偏差的进化,与5-基甲基酸氧化相结合

Haoyue Zhang^1,2, Shengyang Li³, Jing Xu⁴

¹Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Chemistry, an Asian journal

|November 29, 2024

概括

这项研究开发了一种用于高效太阳能转换的新型光电极. 它成功地同时从生物质和中生产了2,5-furandicarboxylic acid (FDCA),为具有成本效益的化学生产铺平了道路.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
可再生能源可再生能源是可再生能源.

背景情况:

光电化学 (PEC) 系统为太阳能转换提供了一个有前途的途径.
生物质的价值化,特别是5-Hydroxymethylfurfural (HMF) 氧化为2,5-furandicarboxylic acid (FDCA),对于生产增值化学品至关重要.
需要有效的催化剂,以在PEC系统中将演化反应 (HER) 与生物质价值化相结合.

研究的目的:

开发一种有效的光电极,通过5基甲基 (HMF) 氧化反应 (HMFOR) 有效地产生2,5-基酸 (FDCA).
构建一个双光电极系统,用于同时生产FDCA和H2.
提高太阳能转化为化学能量的转化效率.

主要方法:

使用金属化,剂分离和表面重建制造双金属化物Ni0.95Pt0.05Si/n-Si光电极的制造.
接口工程,以确保高效的接口电荷传输和提高Schottky屏障高度.
将光电极与Ni0.95Pt0.05Si/p-Si光阴极集成,形成一个双光电极系统.

主要成果:

在照明下,Ni0.95Pt0.05Si/n-Si光电极实现了高HMF转换 (97.2%) 和FDCA收益率 (80.3%).
双光电极系统在零偏差下显示出高光电流密度为5mA cm−2.
实现了FDCA和H2的同时生产,并具有出色的PEC性能.

结论:

开发的Ni0.95Pt0.05Si/n-Si光电极策略显著提高了HMFOR的PEC性能.
双光电极系统使得从太阳能中高效同时生产有价值的化学品和气.
这种方法为将太阳能转化为工业单体提供了一种具有成本效益的途径.

关键词:

5-氧甲基酸氧化5-氧甲基酸.基于Si的光电极.双光电极系统双光电极系统光电化学光电化学表面的重建表面的重建

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P-N junction

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