Bibliographic Details
| Title: |
Ni−Co 催化剂构建及其解聚煤基 腐植酸强化电解制氢性能. |
| Alternate Title: |
Construction of Ni–Co catalysts and enhanced electrolytic hydrogen production using depolymerized coal-based humic acid. |
| Authors: |
贾金鹏1 444767986@qq.com, 岳志晶1, 刘向国1, 杨柯利1, 周华从1, 班延鹏1, 李 娜1 nali87@imut.edu.cn, 刘全生1 liuqs@imut.edu.cn |
| Source: |
Clean Coal Technology. 2026, Vol. 32 Issue 2, p353-363. 11p. |
| Subject Terms: |
*Hydrogen production, *Humic acid, *Cyclic voltammetry, *Nickel catalysts, *Oxidation-reduction reaction, *Water electrolysis, *Electroplating |
| Abstract (English): |
Carbon-assisted water electrolysis (CAWE) introduces a carbon source at the anode, utilizing the carbon oxidation reaction (COR) to replace the oxygen evolution reaction (OER), can significantly reduce the reaction overpotential and represents an efficient hydrogen production strategy with both economic and sustainable advantages. Developing a highly active, low-cost, and stable electrocatalytic system has become the key to enhancing the performance of CAWE. A Ni−Co nanosheet-structure catalyst is fabricated on a nickel foam (NF) substrate using an electrodeposition combined with cyclic voltammetry (CV) activation strategy, and is applied to a humic acid (HA)-assisted water electrolysis system to achieve efficient and low-energy hydrogen production. When 0.35 g HA is added to 1 mol/L KOH, the Ni–Co/NF electrode requires an overpotential of only 254.4 mV to deliver a current density of 10 mA/cm², achieving a hydrogen production rate of 28.22 mL/(h·cm ²) with an energy consumption as low as 3.82 kWh/Nm³ . Mechanistic investigations demonstrate that Ni−Co/NF catalyzes the reversible conversion of Ni2+/Ni3+ and Co2+/Co3+ under alkaline conditions, continuously generating highly active free radicals (·OH, ·O-2 ) that selectively cleave and oxidize HA molecules, thereby achieving synergistic promotion of carbon oxidation and hydrogen evolution reactions.In conclusion, the Ni−Co/NF catalyst exhibits excellent catalytic activity and stability, providing new insights and a theoretical basis for the construction of low-energy hydrogen production systems and the electrochemical conversion of humic acid. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
碳辅助电解水 (CAWE) 通过在阳极引入碳源, 利用碳氧化反应 (COR) 以替代析氧反应 (OER), 能够显著降低反应电位, 是一种兼具经济性与可持续性的高效制氢策略。开发高活性、低成本且稳定的电催化体系是提升 CAWE 性能的关键。研究采用电沉积结合循环伏安法 (CV) 活化策略, 在泡沫镍 (NF) 基底上成功构筑了 Ni-Co 纳米片结构催化剂, 并将其应用于腐植酸 (HA) 辅助电解水体系, 实现高效低能耗制氢。在 1 mol/ L KOH 中添加 0.35 g HA 时, Ni-Co/NF 仅需 254.4 mV 的过电位即可实现 10 mA/cm²的电流密度, 产氢速率为 28.22 mL/( h ·cm²), 能耗仅为 3.82 kWh/Nm³。机理研究表明, Ni-Co/NF 在碱性条件下通过 Ni2+/Ni3+与 Co2+/Co3+的可逆转化, 持续生成高活性自由基 OH, . O-2 对 HA 分子结构进行选择性断裂与氧化, 从而实现碳氧化与析氢反应的协同促进。综上, Ni-Co/NF 催化剂兼具优异的催化活性及稳定性, 为构建低能耗制氢体系及 HA 电化学转化提供了新的研究思路与理论基础。 [ABSTRACT FROM AUTHOR] |
| Database: |
Energy & Power Source |
