Sammanfattning

Subjecting phosphotungstic acid solutions to low pH in combination with introduction of polyvalent cations led to the formation of nanostructured microspheres of approximately 2 mu m in size, as shown by scanning electron microscopy, which were almost insoluble and resistant to degradation at neutral and high pH. These microspheres were composed of secondary nanospheres with diameters around 20 nm as revealed by transmission electron microscopy and atomic force microscopy. Investigations of the crystal structure of a potential intermediate of this process, namely, acidic lanthanum phosphotungstate, [La(H2O)(9)](H3O)(3)[PW12O40](2)(H2O)(19), showed a tight network of hydrogen bonding, permitting closer packing of phosphotungstic acid anions, thereby confirming the mechanism of the observed self-assembly process. The new material demonstrated promising electrochemical properties in oxygen evolution reactions with the high stability of the obtained electrode material.

Publicerad i

Inorganic Chemistry
2024, Volym: 63, nummer: 7, sidor: 3428-3435
Utgivare: AMER CHEMICAL SOC

SLU författare

• Greijer, Björn

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

• Daniel, Geoffrey

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

• Seisenbaeva, Gulaim

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

• Kessler, Vadim

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Oorganisk kemi


Publikationens identifierare

DOI: https://doi.org/10.1021/acs.inorgchem.3c04122

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/128722