Praise be to Allah.
There is no specific soorah or duaa that may be recited in the situation described, but this wife can pray for her husband however she wishes, such as saying, O Allaah, take away his anger, O Allaah, make him patient, O Allaah, grant him tranquillity. She should call on her Lord by His Most Beautiful Names and beseech Him to help her; she should strive to offer her supplication at the times when duaas are most likely to be accepted, such as during the last third of the night, or the last hour of Friday, or the Day of Arafaah, and when prostrating during prayer, and so on. We ask Allaah to put their affairs straight. May Allaah bless our Prophet Muhammad.