Ultrathin S-doped MoSe₂nanosheets for efficient hydrogen evolution

Abstract

We report the synthesis of ultrathin S-doped MoSe 2 nanosheets demonstrating enhanced HER catalysis with a low onset overpotential of 90 mV and a Tafel slope of 58 mV per decade. We attribute the improved catalytic effects to the proliferation of unsaturated HER active sites in MoSe 2 resulting from S-doping.

One-pot synthesis of nanosheet-assembled hierarchical MoSe2/CoSe2 microcages for the enhanced performance of electrocatalytic hydrogen evolution

“…As shown in The Tafel slope can also be adopted for the assessment of the rate-determining step in the HER process. 49,79 In acidic medium, the whole HER process includes the following three steps. First …”

Sulfur and nitrogen self-doped carbon nanosheets derived from peanut root nodules as high-efficiency non-metal electrocatalyst for hydrogen evolution reaction

“…[5,9] Hence, development of sustainable HER catalysts that are composed of cost-effective and earth-abundant elements has been one of the main challenges in renewable energy research so far. [10][11][12] In fact, Mo-based sulfides, nitrides, carbides and selenides (e.g., MoS 2 , Mo 2 C, Ni-Mo-N and MoSe 2 ), [12][13][14][15][16][17] Co/Ni-based metal sulphides, selenides, phosphides (e.g., CoS 2 , CoSe 2 , CoP, and Ni 12 P 5 ) [18][19][20][21] and other sulphides (TiS 2 and TaS 2 ) [22] have been prepared and examined as effective HER catalysts in a series of recent studies.…”

CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

“…Significant progresses have been achieved in the development of acid-stable non-precious metal catalysts for HER [5][6][7][8][9]. Many economic metal compounds have been reported to show HER catalytic properties, such as MoS x [10][11][12][13], MoSe 2 [14][15][16], WS 2 [17][18][19][20][21], WSe 2 [22,23], MoB [24,25], Mo 2 C [26][27][28][29] and CoSe 2 [30][31][32][33]. However, the efficiency for most of the proposed catalysts is still much lower than that of Pt (Tafel is around 30 mV/dec), likely limited by the density and reactivity of available active sites.…”