Moreover, the lower Tafel slope displayed by Co4-WS indicates faster kinetics than Fe4-WS, which correlates well with the lower activation barriers found for the Co-POM. It is very illustrative to see that even though POM-Fe III OH and POM-Co II OH 2 anions show significant differences in their electronic structures, the observed overpotentials ...

Polyoxometalates (POMs) are polyatomic ions with closed three-dimensional frameworks. Their unique structure contains a large number of redox active sites, making them promising electrocatalysts...

2021年5月19日 · Overall, the proposed reaction mechanism for Fe4-WS is analogous to that found for Co4-WS, despite their electronic differences. The potential limiting step is a proton-coupled electron transfer event yielding the active S2 (Fe IV [double bond, length as m-dash]O) species, which receives a water nucleophilic attack to form the O-O bond.

2022年6月1日 · Herein, we report a 1 T-WS 2 in ultrathin nanosheet arrays grafted with Co 4 S 3 on conductive carbon cloth (CC) (1 T-Co 4 S 3-WS 2 /CC) through a feasible in-situ growth and vulcanization. The optimized 1 T-Co 4 S 3 -WS 2 /CC catalyst exhibits an impressive electrocatalytic activity and remarkable stability with the oxygen/hydrogen evolution ...

2021年5月19日 · The tetracobalt Weakley sandwich [CoII4(H2O)2(B-α-PW9O34)2]10− (Co4-WS) has been one of the most extensively studied. We have compared its activity with that of the iron analog [FeIII4(H2O)2(B-α-PW9O34)2]6− (Fe4-WS) looking for …

The tetracobalt Weakley sandwich [CoII4(H2O)2(B-α-PW9O34)2]10– (Co4-WS) has been one of the most extensively studied. We have compared its activity with that of the iron analog [FeIII4(H2O)2(B-α-PW9O34)2]6– (Fe4-WS) looking for the …

2017年7月10日 · Water oxidation is a complex four-electron redox process that produces protons and oxygen, and typically requires very high overpotentials η. Earth-abundant and...

2021年5月19日 · Cobalt polyoxometalates (Co-POMs) have emerged as promising water oxidation catalysts (WOCs), with the added advantage on their molecular nature despite being metal oxides fragments. In...

Here we report the synthesis of an ordered, mixed-metal cobalt-iron Weakley archetype [CoII2(H2O)2FeIII2(CoIIW9O34)2]14− (Co2Fe2-WS), which unexpectedly highlights the strong influence of the central, coordinatively saturated metal ions …

2024年4月22日 · Here we report the synthesis of an ordered, mixed-metal cobalt–iron Weakley archetype [CoII2(H2O)2FeIII2(CoIIW9O34)2]¹⁴⁻ (Co2Fe2-WS), which unexpectedly highlights the strong influence of ...