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Yu, Xiaohan; Xu, Yuting; Li, Le; Zhang, Mingzhe; Qin, Wenhao; Che, Fanglin; Zhong, Miao
Nature communications, 02/2024, Letnik: 15, Številka: 1Journal Article
Abstract Acidic CO 2 electroreduction (CO 2 R) using renewable electricity holds promise for high-efficiency generation of storable liquid chemicals with up to 100% CO 2 utilization. However, the strong parasitic hydrogen evolution reaction (HER) limits its selectivity and energy efficiency (EE), especially at ampere-level current densities. Here we present that enhancing CO 2 R intermediate coverage on catalysts promotes CO 2 R and concurrently suppresses HER. We identified and engineered robust Cu 6 Sn 5 catalysts with strong * OCHO affinity and weak * H binding, achieving 91% Faradaic efficiency (FE) for formic acid (FA) production at 1.2 A cm −2 and pH 1. Notably, the single-pass carbon efficiency reaches a new benchmark of 77.4% at 0.5 A cm −2 over 300 hours. In situ electrochemical Fourier-transform infrared spectroscopy revealed Cu 6 Sn 5 enhances * OCHO coverage ~2.8× compared to Sn at pH 1. Using a cation-free, solid-state-electrolyte-based membrane-electrode-assembly, we produce 0.36 M pure FA at 88% FE over 130 hours with a marked full-cell EE of 37%.
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Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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