Details

Autor(en) / Beteiligte

• Yuan, Jian-Tao
• Hou, Juan-Juan
• Liu, Xue-Li
• Feng, Ya-Ru
• Zhang, Xian-Ming

Titel

Optimized trimetallic benzotriazole-5-carboxylate MOFs with coordinately unsaturated active sites as an efficient electrocatalyst for the oxygen evolution reaction

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2020-01, Vol.49 (3), p.75-756

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Exploring efficient and stable oxygen evolution reaction (OER) catalysts with earth-abundant elements has been an urgent task in water splitting. Metal-organic frameworks (MOFs), possessing abundant active metal sites and tunable porous crystalline structures, are promising as OER catalysts. In this paper, a MOF based on benzotriazole-5-carboxylate ( Co 3 -btca ) that contains unsaturated coordinated metal centers and a 1D channel was selected to act as an OER catalyst. To optimize the OER performance, isostructural bimetallic and trimetallic frameworks were obtained by doping with Fe and/or Ni ions. The optimized Co 2.36 Fe 0.19 Ni 0.45 -btca possesses the lowest overpotential of 292 mV at 10 mA cm −2 and a small Tafel slope of 72.6 mV dec −1 . The enhanced catalytic performance could be attributed to the synergistic effect between the unsaturated coordinated Co, Fe and Ni sites, which are beneficial for the nucleophilic attack of OH − forming adsorption intermediates. Enhanced OER performance of bimetallic and trimetallic MOFs were gained through synergistic effect in Fe/Co/Ni unsaturated coordination sites.