NiIII-rich NiFeBa as an Efficient Catalyst for Water Oxidation

• Electrocatalytic water oxidation requires efficient catalysts to reduce the overpotential and accelerate the sluggish kinetics of oxygen formation. Here, a promising NiFeBa material was prepared by the co-electrodeposition of Ba2+, Ni2+, and Fe3+ as an efficient catalyst for electrocatalytic water oxidation. NiFeBa showed enhanced water oxidation performance compared with NiFe layered double hydroxide and NiFe oxide, delivering a current density of 10 mA cm−2 at an overpotential of 180 mV. Doped Ba ions played a key role in stabilizing the electrogenerated Ni3+ species, producing more octahedral Ni−O structures for lattice oxygen-based water oxidation, adjusting the catalytic mechanism, and finally leading to an enhancement of catalytic efficiency. 

Ämnesord

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)

NATURVETENSKAP  -- Kemi -- Annan kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)

Nyckelord

doping

electrocatalysis

electrodeposition

water oxidation

water splitting

Barium alloys

Binary alloys

Catalysts

Catalytic oxidation

Oxidation

Oxygen

Ternary alloys

Catalytic efficiencies

Catalytic mechanisms

Co-electrodeposition

Efficient catalysts

Electrocatalytic

Layered double hydroxides

Sluggish kinetics

Iron alloys

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)