当前位置: X-MOL 学术ACS Sustain. Chem. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Iodide Oxidation Reaction Catalyzed by Ruthenium–Tin Surface Alloy Oxide for Efficient Production of Hydrogen and Iodine Simultaneously
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2021-06-21 , DOI: 10.1021/acssuschemeng.1c01867
Dessalew Berihun Adam, Meng-Che Tsai, Yohannes Ayele Awoke, Wei-Hsiang Huang, Yaw-Wen Yang, Chih-Wen Pao, Wei-Nien Su, Bing Joe Hwang

A new type of electrolysis by employing iodide oxidation reaction (IOR) via a ruthenium–tin surface alloy oxide (RuSn SAO) catalyst was designed to replace oxygen evolution reaction (OER) for efficient production of hydrogen, which not only enhances energy conversion efficiency but also produces a high-value commodity chemical, iodine, rather than O2, in the anodic cell. Remarkably, the excellent activity of RuSn SAO enables it to be the best catalyst for IOR toward energy-saving hydrogen production. Its two-electrode acidic electrolyzer requires a cell voltage of only 1.07 V to afford 10 mA cm–2, which is 0.51 V less than that required for OER to reach the same current density. Thus, the system drastically reduces energy consumption by more than 40% compared to pure water electrolysis. The chronopotentiometric test shows that the RuSn SAO needed a super-low overpotential increase of Δη = 70 mV at 10 mA cm–2 together with recorded highly durable stability in the acidic electrolyte, indicating enhanced catalytic activity. Furthermore, this strategy simultaneously produces hydrogen with ∼100% Faradic efficiency and a high-value commodity chemical, I2, making H2 production potentially costless. Thus, the proposed concept paves a new way to facilitate the realization of hydrogen economics.

中文翻译:

钌锡表面合金氧化物催化碘氧化反应同时高效产氢和碘

设计了一种通过钌-锡表面合金氧化物(RuSn SAO)催化剂采用碘化物氧化反应(IOR)的新型电解,以取代析氧反应(OER)以高效生产氢气,不仅提高了能量转换效率,而且还在阳极电池中产生高价值的商品化学品碘,而不是 O 2。值得注意的是,RuSn SAO 的优异活性使其成为 IOR 节能制氢的最佳催化剂。其双电极酸性电解槽仅需 1.07 V 的电池电压即可提供 10 mA cm –2,这比 OER 达到相同电流密度所需的电压低 0.51 V。因此,与纯水电解相比,该系统大大降低了 40% 以上的能耗。计时电位测试表明,RuSn SAO 需要在 10 mA cm –2 下超低的过电位增加 Δ η = 70 mV,并在酸性电解质中记录到高度持久的稳定性,表明催化活性增强。此外,该策略同时生产具有约 100% 法拉第效率的氢气和高价值的商品化学品 I 2,从而使 H 2 的生产潜在成本低廉。因此,所提出的概念为促进氢经济的实现铺平了道路。
更新日期:2021-07-05
down
wechat
bug