産業廃ガスから水素を生成するグリーン技術を実証（Chinese Green Innovation Project Produces Hydrogen from Waste Gas）

2026-01-07 中国科学院（CAS）

＜関連情報＞

• https://english.cas.cn/newsroom/cas_media/202601/t20260107_1145346.shtml
• https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202502032

H2S電気分解によるH 2生成用の高効率で耐久性のある一体型チェーンメイル電極 Highly Effective and Durable Integrated-Chainmail Electrode for H2 Production through H2S Electrolysis

Mo Zhang, Zuochao Wang, Liumo Jiang, Xin Bo, Xiaoju Cui, Dehui Deng
Angewandte Chemie International Edition  Published: 13 February 2025
DOI:https://doi.org/10.1002/anie.202502032

Graphical Abstract

A robust integrated electrode that features a dual-level chainmail structure with graphene encapsulating nickel foam is developed to enhance H₂S electrolysis for green hydrogen production. The unique integrated-chainmail structure significantly improves both the activity and stability of the nickel foam. This chainmail electrodes realizes efficient hydrogen production at a high power of 224 W with 43 % electricity consumption reduction.

Abstract

H₂S is a prevalent yet toxic gas commonly encountered during fossil fuel extraction, whose electrolysis not only addresses pollution concerns but also facilitates hydrogen production. However, the advancement of H₂S electrolysis at high current density has been impeded by the lack of stable and highly active electrodes that can endure the corrosive effects of H₂S poisoning. Herein, we present an integrated-chainmail electrode that features dual-level chainmail structure with graphene encapsulating nickel foam (Ni@NC foam) to enhance H₂S electrolysis. The electrode comprises a primary chainmail, formed by graphene coating on the surface of nickel foam, and a secondary chainmail, created by graphene encapsulating nickel nanoparticles. This integrated-chainmail structure significantly enhances both the activity and stability of nickel foam, which delivers an industrial-scale high current density exceeding 1 A cm⁻² at 1.12 V versus reversible hydrogen electrode, above five times higher than nickel foam. Moreover, the Ni@NC foam remains stable over 300 hours of test, demonstrating a lifespan at least ten times longer than nickel foam. In a demo for H₂S removal from simulated natural gas, the Ni@NC foam as the electrodes exhibits a hydrogen production rate of 272 ml min⁻¹, while reducing electricity consumption by 43 % compared with traditional water electrolysis.