Browsing by Author "Sun, T."
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Item Three-Dimensionally Ordered Macro-/Mesoporous Ni as a Highly Efficient Electrocatalyst for the Hydrogen Evolution Reaction(Royal Society of Chemistry, 2015-04-13) Sun, T.; Zhang, C.; Chen, J.; Yan, Y.; Zakhidov, Anvar A.; Baughman, Ray H.; Xu, L.; 0000 0003 5232 4253 (Baughman, RH); 0000-0003-3983-2229 (Zakhidov, AA); Zakhidov, Anvar A.; Baughman, Ray H.Three-dimensionally (3D) ordered macro-/mesoporous (3DOM/m) Ni is fabricated by the chemical reduction deposition method using lyotropic liquid crystals (LLC) to template the mesostructure within the regular voids of a colloidal crystal (opal). The thereby achieved structural advantages of combining well-ordered bicontinuous mesopores with 3D interconnected periodic macropores, such as abundant exposed catalytically active sites, efficient mass transport, and high electrical conductivity, make this non-noble metal structure an excellent hydrogen evolution reaction (HER) electrocatalyst. The 3DOM/m Ni exhibits a low onset overpotential of 63 mV (vs. RHE) and a small Tafel slope of 52 mV per decade, as well as a long-term durability in alkaline medium. These distinct features of the 3DOM/m Ni render it a promising alternative to Pt-based HER electrocatalysts.