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Ultrathin porous CoP nanosheets drive HER
Phosphidation of Co3O4 yields sub-1.1 nm porous CoP sheets with exposed {200} facets and high HER mass activity.
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How are CoP ultrathin porous nanosheets made?
Low-temperature phosphidation of Co3O4 precursors.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What overpotentials give 10 and 100 mA cm–2?
56 mV and 131 mV.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What Tafel slope was measured?
44 mV per decade.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What mass activity at 100 mV overpotential?
151 A g–1.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What Faradaic efficiency and stability?
Nearly 100% FE and at least 20 h.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What electrolyte and reference were used?
0.5 M H2SO4 with an SCE reference in a three-electrode cell.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What double-layer capacitances were fitted?
7.87 mF cm–2 (UPNSs) vs 0.358 mF cm–2 (CoP NPs).
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
Which CoP(100) termination is more stable?
P-terminated (200): 1.73 vs 1.78 eV Å–2 for Co-terminated.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What phosphidation recipe was used?
Co3O4 (10 mg) and NaH2PO2·2H2O (2 g) heated to 300 °C for 120 min in Ar.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What four structural features are claimed?
Ultrathin (two unit cells), porous, high {200} exposure, plus distortion/amorphous regions.
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified
What assumed specific capacitance was used for ECSA?
40 μF cm–2 (typical flat-surface range 20–60).
Source: Sub-1.1 nm ultrathin porous CoP nanosheets with dominant reactive {200} facets: a high mass activity and efficient electrocatalyst for the hydrogen evolution reaction · DOI · quote verified