A mononuclear Co(II) derivative, (1) is afforded by employing a ‘scorpionate’ type precursor, bdtbpza [bdtbpza = bis(3,5-di-t-butylpyrazol-1-yl)acetate]. Single crystal X-ray structure reveals that the Co II ion exhibits an octahedral geometry possessing on a O 6 coordination environment. Detailed EPR interpretation and electrocatalytic hydrogen evolution study are reported. Electrochemical and catalytic study of 1 in DMSO with the presence of acetic acid as weak proton source shows an observed rate constant of 3.7 × 10 3 s −1 and hydrogen evolution Faradaic efficiency of 74.7%. The catalytic process requires two-electron reduction of the catalyst and formation of a cobalt(II)-hydride species as reactive intermediate.
Electrocatalytic H 2 Evolution of Bis(3,5-di-methylpyrazol-1-yl)acetate Anchored Hexa-coordinated Co(II) Derivative / Das, Kuheli; Beyene, Belete B.; Datta, Amitabha; Garribba, Eugenio; Hung, Chen-Hsiung. - In: CATALYSIS LETTERS. - ISSN 1011-372X. - 148:9(2018), pp. 2703-2708. [10.1007/s10562-018-2477-2]
Electrocatalytic H 2 Evolution of Bis(3,5-di-methylpyrazol-1-yl)acetate Anchored Hexa-coordinated Co(II) Derivative
Garribba, Eugenio;
2018-01-01
Abstract
A mononuclear Co(II) derivative, (1) is afforded by employing a ‘scorpionate’ type precursor, bdtbpza [bdtbpza = bis(3,5-di-t-butylpyrazol-1-yl)acetate]. Single crystal X-ray structure reveals that the Co II ion exhibits an octahedral geometry possessing on a O 6 coordination environment. Detailed EPR interpretation and electrocatalytic hydrogen evolution study are reported. Electrochemical and catalytic study of 1 in DMSO with the presence of acetic acid as weak proton source shows an observed rate constant of 3.7 × 10 3 s −1 and hydrogen evolution Faradaic efficiency of 74.7%. The catalytic process requires two-electron reduction of the catalyst and formation of a cobalt(II)-hydride species as reactive intermediate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.