Ultra-low cobalt loading on N-doped carbon nanosheets by polymer pyrolysis strategy for efficient electrocatalytic hydrogen evolution

Impacts of Metal–Support Interaction on Hydrogen Evolution Reaction of Cobalt-Nitride-Carbide Catalyst

“…For the Co-N-C X catalysts, the overpotential of Co-N-C 0.0125M , Co-N-C 0.025M , Co-N-C 0.05M , and Co-N-C 0.075M at a current density of 10 mA cm −2 was 176, showed that obvious recession occurred when 0.1 M KSCN solution was added in the acid electrolyte. The significant increase of the overpotential after KSCN treatment confirmed that Co species were the catalytic active sites (Li et al, 2020b). The Co-N-C 0.025M on glass carbon electrode had the same onset potential compared with RDE, which means an excellent intrinsic HER activity of Co-N-C 0.025M , but a were lowest among the Co-N-C X and H-Co-N-C X catalysts, representing the best HER catalytic activity.…”

Advanced Design of Metal Nanoclusters and Single Atoms Embedded in C1N1‐Derived Carbon Materials for ORR, HER, and OER

“…Table S4 (Supporting Information) and Figure 4f compare the catalytic activity of TM@CN x for HER with the most promising TM-based electrocatalysts in the recent literature. [50][51][52][53][54][55][56][57][58] The literature search confirms that Co and Ni-based catalysts show outstanding properties toward the HER, followed by Fe and Mn. Cu-based electrocatalysts show insufficient performance to prepare an adequate HER electrocatalyst, in agreement with our experimental results.…”

“…The factor to evaluate the OER activity is often referred to as the potential required to reach 10 mA•cm −2 (E OER ). As shown in Figure 5a, Ni@CN x exhibits excellent catalytic activity toward the OER, [50][51][52][53][54][55][56][57][58] Blue, yellow, orange, green and violet represent Fe-, Ni-, Co-, Cu-and Mn-based catalysts, respectively. The solid symbols correspond to the data obtained in this work.…”

“…d) LSV curves before and after 100 cycles for Co@CNx in N 2 -saturated 0.5 m H 2 SO 4 solution at a scan rate of 5 mV•s −1 and 1600 rpm. e) Literature search of transition metal-based electrocatalysts for the hydrogen evolution reaction [50][51][52][53][54][55][56][57][58]. Blue, yellow, orange, green and violet represent Fe-, Ni-, Co-, Cu-and Mn-based catalysts, respectively.…”

Synthesis of a graphitized hierarchical porous carbon material supported with a transition metal for electrochemical conversion

“…16 Li et al demonstrated a polymer encapsulation strategy to synthesize carbon-supported single atom catalysts, 17 which have been widely adopted by other researchers. [18][19][20][21] However, only M/NC catalysts with micropores can be obtained by this method, with less accessibility of active sites. In order to enhance the exposure of metal active sites, it remains interesting for synthesis of hierarchical porous M/NC catalysts, but has rarely been reported.…”