一种生物质衍生的碳基电催化剂，可在常温常压下高效固定 N 为 NH。

A Biomass-Derived Carbon-Based Electrocatalyst for Efficient N Fixation to NH under Ambient Conditions.

机构信息

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054, Sichuan, China.

School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, Sichuan, China.

出版信息

Chemistry. 2019 Feb 6;25(8):1914-1917. doi: 10.1002/chem.201805523. Epub 2019 Jan 9.

DOI:10.1002/chem.201805523

PMID:30523656

Abstract

Currently, NH production primarily depends on the Haber-Bosch process, which operates at elevated temperatures and pressures and leads to serious CO emissions. Electrocatalytic N reduction offers an environmentally benign approach for the sustainable synthesis of NH under ambient conditions. This work reports the development of biomass-derived amorphous oxygen-doped carbon nanosheet (O-CN) using tannin as the precursor. As a metal-free electrocatalyst for N -to-NH conversion, such O-CN shows high catalytic performances, achieving a large NH yield of 20.15 μg h mg and a high Faradic efficiency of 4.97 % at -0.6 V vs. reversible hydrogen electrode (RHE) in 0.1 m HCl at ambient conditions. Remarkably, it also exhibits high electrochemical selectivity and durability.

摘要

目前，NH 的生产主要依赖于 Haber-Bosch 工艺，该工艺在高温高压下运行，导致严重的 CO 排放。电催化 N 还原为在环境条件下可持续合成 NH 提供了一种环境友好的方法。本工作报道了使用单宁作为前驱体制备生物质衍生的无定形氧掺杂碳纳米片（O-CN）。作为一种用于 N 到 NH 转化的无金属电催化剂，这种 O-CN 表现出很高的催化性能，在 0.1 m HCl 中于环境条件下在-0.6 V 相对于可逆氢电极（RHE）时，可实现大的 NH 产率 20.15 μg h mg 和高的法拉第效率 4.97%。值得注意的是，它还表现出高的电化学选择性和耐久性。