Deep removal of ppm-HS is critical for H quality control due to the increasing demand for ultrahigh-purity H in the up-and-coming fuel cell market. Herein, a CuCo layered double hydroxide (LDH) adsorbent with basic surface and high dispersion of active (Cu, Co) metal sites was developed for selective capture of ppm-HS. The as-synthesized adsorbent enables effective elimination of HS from 50 to <1 ppm with superior dynamic adsorption capacity of 187 mg-HS/g-ads, which outperformed the reported benchmark adsorbents. The excellent performance could be attributed to the hollow structure and ultra-thin LDH nanosheets, which endow the high exposure of metal hydroxide sites, and thus facilitating the selective capture of HS through reactive adsorption. For practical application, the effects of CO and HO on adsorption were also investigated. The excellent HS adsorption performance demonstrated in this work makes hydroxide a promising adsorbent for removal of ppm-HS for ultrahigh purity H production.

中文翻译：

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CuCo层状双氢氧化物吸附剂深度去除超稀H2S纯化H2


由于新兴燃料电池市场对超高纯氢气的需求不断增加，深度去除 ppm-HS 对于氢气质量控制至关重要。在此，开发了一种具有碱性表面和活性（Cu、Co）金属位点高度分散的 CuCo 层状双氢氧化物（LDH）吸附剂，用于选择性捕获 ppm-HS。合成的吸附剂能够有效去除 50 至 <1 ppm 的 H2S，具有 187 mg-HS/g-ads 的卓越动态吸附容量，优于报道的基准吸附剂。优异的性能归因于中空结构和超薄LDH纳米片，赋予金属氢氧化物位点高度暴露，从而促进通过反应吸附选择性捕获H2S。为了实际应用，还研究了CO和H2O对吸附的影响。这项工作中展示的优异的 H2S 吸附性能使氢氧化物成为一种有前景的吸附剂，用于去除 ppm-HS，用于超高纯 H 的生产。