2018
DOI: 10.1021/jacs.8b05134
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Necklace-like Multishelled Hollow Spinel Oxides with Oxygen Vacancies for Efficient Water Electrolysis

Abstract: The durability and reactivity of catalysts can be effectively and precisely controlled through the careful design and engineering of their surface structures and morphologies. Herein, we develop a novel "adsorption-calcination-reduction" strategy to synthesize spinel transitional metal oxides with a unique necklace-like multishelled hollow structure exploiting sacrificial templates of carbonaceous microspheres, including NiCoO (NCO), CoMnO, and NiMnO. Importantly, benefiting from the unique structures and redu… Show more

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Cited by 468 publications
(275 citation statements)
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“…Inspired by the above theoretical studies, we prepared P‐Co 9 S 8 nanocages by using Cu 2 O nanocubes as sacrificial templates (see the detailed synthesis process in Figure S1 in the Supporting Information). It is noted that the high specific surface area and porous shell from hollow structure endow the catalysts with rich active sites, local chemical microenvironment, and high charge transfer rate, which contributes to forming a favorable catalytic interface between catalysts and electrolytes, thus contributing to improving OER performance . First, Cu 2 O nanocubes as sacrificial templates are fabricated by a previously reported wet‐chemical route (Figure S2, Supporting Information) .…”
Section: Resultsmentioning
confidence: 99%
“…Inspired by the above theoretical studies, we prepared P‐Co 9 S 8 nanocages by using Cu 2 O nanocubes as sacrificial templates (see the detailed synthesis process in Figure S1 in the Supporting Information). It is noted that the high specific surface area and porous shell from hollow structure endow the catalysts with rich active sites, local chemical microenvironment, and high charge transfer rate, which contributes to forming a favorable catalytic interface between catalysts and electrolytes, thus contributing to improving OER performance . First, Cu 2 O nanocubes as sacrificial templates are fabricated by a previously reported wet‐chemical route (Figure S2, Supporting Information) .…”
Section: Resultsmentioning
confidence: 99%
“…The plasma‐engraved Co 3 O 4 nanosheets with abundant O‐vacancies show an overpotential of 300 mV at 10 mA cm −2 , a remarkably decreased overpotential by 240 mV than its pristine counterpart . Due to the greatly lowered energy barrier of the formation of OER intermediates by O‐vacancies, the reduced NiCo 2 O 4 by NaBH 4 treatment with necklace‐like multi‐shelled hollow structure only needs less overpotential by 40 mV than that of the pristine spinel oxide …”
Section: Figurementioning
confidence: 99%
“…[1][2][3] Among the cleanest routes to produce energy is through the production of hydrogen, ideally through water splitting. [1][2][3] Among the cleanest routes to produce energy is through the production of hydrogen, ideally through water splitting.…”
Section: Introductionmentioning
confidence: 99%
“…d) Nyquist plots for bulk Ni 3 Na nd NiO nanosheets.e )Stability of Ni3 Nn anosheets. c) OER activity at 100 mA cm À2 per geometric area.…”
mentioning
confidence: 99%