Mixed-metal oxides are {generally|usually|typically|normally|commonly|frequently} {considered|regarded as|deemed|regarded|viewed as|thought of} {to be|to become} the highest-performance catalysts for alkaline water oxidation. {Despite|Regardless of|In spite of} {significant|substantial|considerable|important} efforts {dedicated|devoted|committed} to understanding and accelerating their efficiency, most {works|functions|operates|performs} {have been|happen to be|have already been} {limited|restricted} investigations of Ni, Co, and Fe oxides, {thus|therefore|hence|as a result} overlooking {beneficial|advantageous|helpful|useful|valuable|effective} effects of hetero-anion incorporation. To this {end|finish}, we report {on the|around the} {development|improvement} of Co0.5Fe0.5O0.5F1.{5|five} oxyfluoride {materials|supplies|components} featuring a rutile crystal structure and porous morphology {via|by way of|through|by means of} a scalable and green synthetic route. The catalyst surface, enhanced {through|via|by means of|by way of} electron withdrawing effects imparted by the fluoride ions, give rise to {highly|extremely|very|hugely} {effective|efficient|successful|powerful|productive|helpful} catalytic {sites|websites|web sites|internet sites|web-sites|web pages} for electrochemical water oxidation. In {particular|specific|certain|distinct|unique}, their {performance|overall performance|efficiency|functionality} across metrics of Tafel slope (27 mV/dec), mass activity (846 A/g at 1.53 V vs. RHE), turnover frequency (21/s at 1.53 V vs. RHE), overpotential (220 mV for {10|ten} mA/cm2), and stability (27 days of continuous operation) largely surpasses most {known|recognized|identified} Co-based catalysts. Mechanistic {studies|research} {suggest|recommend} that this {performance|overall performance|efficiency|functionality} is driven by a bimolecular, oxygen coupling reaction mechanism {through|via|by means of|by way of} proximal active {sites|websites|web sites|internet sites|web-sites|web pages} {on the|around the} catalyst surface, {thus|therefore|hence|as a result} enabling {a new|a brand new} avenue for {achieving|reaching|attaining} accelerated oxygenic electrocatalysis. Bis(4-methoxybenzyl)amine Order 1239591-03-7 Chemscene PMID:23489613
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