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An Amiable Design of Cobalt Single Atoms as the Active Sites for Oxygen Evolution Reaction in Desalinated Seawater
Small ( IF 13.0 ) Pub Date : 2023-08-30 , DOI: 10.1002/smll.202305289
Sada Venkateswarlu 1 , Muhammad Umer 2 , Younghu Son 3 , Saravanan Govindaraju 4 , Gayathri Chellasamy 4 , Atanu Panda 5 , Juseong Park 1 , Sohaib Umer 2 , Jeonghyeon Kim 3 , Sang-Il Choi 3 , Kyusik Yun 4 , Minyoung Yoon 3 , Geunsik Lee 2 , Myung Jong Kim 1
Small ( IF 13.0 ) Pub Date : 2023-08-30 , DOI: 10.1002/smll.202305289
Sada Venkateswarlu 1 , Muhammad Umer 2 , Younghu Son 3 , Saravanan Govindaraju 4 , Gayathri Chellasamy 4 , Atanu Panda 5 , Juseong Park 1 , Sohaib Umer 2 , Jeonghyeon Kim 3 , Sang-Il Choi 3 , Kyusik Yun 4 , Minyoung Yoon 3 , Geunsik Lee 2 , Myung Jong Kim 1
Affiliation
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Green fuel from water splitting is hardcore for future generations, and the limited source of fresh water (<1%) is a bottleneck. Seawater cannot be used directly as a feedstock in current electrolyzer techniques. Until now single atom catalysts were reported by many synthetic strategies using notorious chemicals and harsh conditions. A cobalt single-atom (CoSA) intruding cobalt oxide ultrasmall nanoparticle (Co3O4 USNP)-intercalated porous carbon (PC) (CoSA-Co3O4@PC) electrocatalyst was synthesized from the waste orange peel as a single feedstock (solvent/template). The extended X-ray absorption fine structure spectroscopy (EXAFS) and theoretical fitting reveal a clear picture of the coordination environment of the CoSA sites (CoSA-Co3O4 and CoSA-N4 in PC). To impede the direct seawater corrosion and chlorine evolution the seawater has been desalinated (Dseawater) with minimal cost and the obtained PC is used as an adsorbent in this process. CoSA-Co3O4@PC shows high oxygen evolution reaction (OER) activity in transitional metal impurity-free (TMIF) 1 M KOH and alkaline Dseawater. CoSA-Co3O4@PC exhibits mass activity that is 15 times higher than the commercial RuO2. Theoretical interpretations suggest that the optimized CoSA sites in Co3O4 USNPs reduce the energy barrier for alkaline water dissociation and simultaneously trigger an excellent OER followed by an adsorbate evolution mechanism (AEM).
中文翻译：
钴单原子作为淡化海水析氧反应活性位点的友好设计
水分解绿色燃料是子孙后代的核心，在有限的淡水来源（<1 id=43>3 O 4 USNP）-插层多孔碳（PC）（CoSA-Co 3 O 4 @PC）电催化剂中合成将废橙皮作为单一原料（溶剂/模板）。扩展X射线吸收精细结构光谱（EXAFS）和理论拟合揭示了CoSA位点（PC中的CoSA-Co 3 O 4和CoSA-N 4 ）配位环境的清晰图像。为了阻止直接海水腐蚀和氯气释放，以最小的成本对海水进行淡化（Dseawater），并在该过程中将所得的 PC 用作吸附剂。 CoSA-Co 3 O 4 @PC 在无过渡金属杂质 (TMIF) 1 M KOH 和碱性 D 海水中表现出高析氧反应 (OER) 活性。 CoSA-Co 3 O 4 @PC 的质量活性比商业 RuO 2高 15 倍。理论解释表明，Co 3 O 4 USNP 中优化的 CoSA 位点降低了碱水解离的能量势垒，同时触发了优异的 OER，进而引发吸附质演化机制 (AEM)。
更新日期：2023-08-30
中文翻译：
钴单原子作为淡化海水析氧反应活性位点的友好设计
水分解绿色燃料是子孙后代的核心，在有限的淡水来源（<1 id=43>3 O 4 USNP）-插层多孔碳（PC）（CoSA-Co 3 O 4 @PC）电催化剂中合成将废橙皮作为单一原料（溶剂/模板）。扩展X射线吸收精细结构光谱（EXAFS）和理论拟合揭示了CoSA位点（PC中的CoSA-Co 3 O 4和CoSA-N 4 ）配位环境的清晰图像。为了阻止直接海水腐蚀和氯气释放，以最小的成本对海水进行淡化（Dseawater），并在该过程中将所得的 PC 用作吸附剂。 CoSA-Co 3 O 4 @PC 在无过渡金属杂质 (TMIF) 1 M KOH 和碱性 D 海水中表现出高析氧反应 (OER) 活性。 CoSA-Co 3 O 4 @PC 的质量活性比商业 RuO 2高 15 倍。理论解释表明，Co 3 O 4 USNP 中优化的 CoSA 位点降低了碱水解离的能量势垒，同时触发了优异的 OER，进而引发吸附质演化机制 (AEM)。
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