"promising support" is correct and usable in written English.
You can use it when you want to indicate that someone or something is offering or providing support for an action, plan, etc. For example, "The government is promising support to small businesses during the pandemic."
David Cameron has recently pledged to expand NHS services across the country, promising support to every woman who needs it.
She was the only politician to show up at the flower-arranging exhibition, where several women came up to her, practically with tears in their eyes, promising support.
The United States has tried to counteract this by persuading rebels to reject jihadists, in part by promising support for the opposition and by targeting jihadist militants.
Abbott, who reinforced her strong position in Hackney North, will be the candidate of the party's left, promising support for strong unions and housing policies that are more radical than those in Labour's election manifesto.
The hastily arranged meeting, after another week of turmoil for countries using the euro currency, prompted speculation that Europe would seek to bolster confidence beyond Ireland by promising support, if needed, for other vulnerable economies like Portugal and Spain.
At the time, Samsung was promising support for iOS would be coming "soon".
Overall, CeO2, TiO2 and HSA-ZrO2 are promising supports for the PtNi bimetallic WGS catalyst.
As a result, the necessity for promising supports with higher stability is inevitable.
It has been reported that carbon nanomaterials with higher mesoporosity, surface area, electrical conductivity, stability and suitable anchoring site are promising supports under harsh oxidizing condition of PEMFCs.
Micro- and nanostructured silica and silicon are promising supports that offer the properties needed for not only biocatalysts [5, 6] but also nanovehicle-based drug delivery [7 9], tissue engineering [10, 11], and biosensors [12 14].
The Kurds also can use their five votes to get support from non-Kurds by promising to support what other groups want.
