Uniformly self-decorated Co3O4 nanoparticles on N, S co-doped carbon layers derived from a camphor sulfonic acid and metal-organic framework hybrid as an oxygen evolution electrocatalyst

Author(s)

Khalid, Mohd ^[1] ; Honorato, Ana M. B. ^[2] ; Ticianelli, Edson A. ^[1] ; Varela, Hamilton ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, POB 780, BR-13560970 Sao Carlos, SP - Brazil

^[2] Case Western Reserve Univ, Dept Macromol Sci & Engn, Ctr Adv Sci & Engn Carbon Case4carbon, 10900 Euclid Ave, Cleveland, OH 44106 - USA

• Document type: Journal article
• Source: JOURNAL OF MATERIALS CHEMISTRY A; v. 6, n. 25, p. 12106-12114, JUL 7 2018.
• Web of Science Citations: 9

Abstract

The development of clean hydrogen-based energy technologies depends upon the rational design and synthesis of efficient and earth-abundant electrocatalysts. Despite great efforts, exploring cheap and unique design nanostructured materials for efficient electrocatalysis remains a big challenge. Here, we synthesize a porous co-doped carbon decorated with Co3O4 nanoparticles from pyrolysis of a camphor sulfonic acid and metal-organic framework hybrid. The uniformly self-decorated Co3O4 nanoparticles on N, S co-doped carbon layers (denoted as Co3O4/NSC) offer fast ion/electron transport and thus make the material an excellent oxygen evolution electrocatalyst. The resulting Co3O4/NSC shows an onset potential of 1.41 V versus the reversible hydrogen electrode (vs. RHE) and delivers an anodic current density of 10 mA cm(-2) at 1.49 V vs. RHE, demonstrating fast kinetics for the oxygen evolution reaction (OER) with a small Tafel slope of 70 mV dec(-1), making it superior to many state-of-the-art cobalt oxide-based catalysts recently reported in the literature. (AU)

• FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
• Grantee: Edson Antonio Ticianelli
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/00433-5 - Design and synthesis of multifunctional metal-free electrocatalyst onto carbon fiber yarns for oxygen reduction, and oxygen and hydrogen evolution reactions
• Grantee: Mohmmad Khalid
• Support Opportunities: Scholarships in Brazil - Post-Doctoral