Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity.
Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity.
复制标题
铱单原子催化剂的配位调节最大化水氧化活性。
DOI:
10.1038/s41467-021-27664-z
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发表时间:
2022-01-10
影响因子:
16.6
通讯作者:
Cao R
中科院分区:
文献类型:
--
作者:
Lei Z;Cai W;Rao Y;Wang K;Jiang Y;Liu Y;Jin X;Li J;Lv Z;Jiao S;Zhang W;Yan P;Zhang S;Cao R
Single-atom catalysts (SACs) have attracted tremendous research interests in various energy-related fields because of their high activity, selectivity and 100% atom utilization. However, it is still a challenge to enhance the intrinsic and specific activity of SACs. Herein, we present an approach to fabricate a high surface distribution density of iridium (Ir) SAC on nickel-iron sulfide nanosheet arrays substrate (Ir1/NFS), which delivers a high water oxidation activity. The Ir1/NFS catalyst offers a low overpotential of ~170 mV at a current density of 10 mA cm−2 and a high turnover frequency of 9.85 s−1 at an overpotential of 300 mV in 1.0 M KOH solution. At the same time, the Ir1/NFS catalyst exhibits a high stability performance, reaching a lifespan up to 350 hours at a current density of 100 mA cm−2. First-principles calculations reveal that the electronic structures of Ir atoms are significantly regulated by the sulfide substrate, endowing an energetically favorable reaction pathway. This work represents a promising strategy to fabricate high surface distribution density single-atom catalysts with high activity and durability for electrochemical water splitting. Single-atom catalysts represent a promising materials class for efficient catalytic transformations. Here, authors prepare a high surface distribution density of iridium atoms on nickel-iron sulfide nanosheet arrays to deliver high water oxidation activity and stability.
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影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
影响因子:
16.6
作者:
Aiyappa, Harshitha Barike;Wilde, Patrick;Schuhmann, Wolfgang
通讯作者:
Schuhmann, Wolfgang
影响因子:
62.1
作者:
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通讯作者:
Corma A
影响因子:
7.3
作者:
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通讯作者:
Duan, Xue
影响因子:
3.3
作者:
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通讯作者:
Tian, ZQ